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Agastache Bestimmungsschlüssel / key to species



Für die Einteilung der Sektionen und dem Schlüssel für die Arten der Sektion Agastache wurde
aus folgender Arbeit zitiert:
Lint & Epling: 1945. Revision of Agastache, The American Midland Naturalist, p. 207-230

Der Schlüssel für die Sektion Brittonastrum wird aus der aktuelleren und umfassenden
Arbeit von Sanders zitiert:
Sanders, R.W.: 1979. A systematic study of Agastache section Brittonastrum. Ph. D. Dissertation
University of Texas, Austin


1. Key to the Sections

Anterior (lower) stamens ascending under the upper lip, the posterior (upper) thrust down
and exserted between them; plants of the United States, (exclusive of Arizona, New Mexico
and texas, except the northeastern portion), and southeastern Asia...................................1. Agastache (alt: Chiastandra Epl.)

Stamens parallel, both pairs thrust similary out from the tube; plants of Arizona, New Mexico,
southern Colorado and Texas, ranging southward to central Mexico.................................2. Brittonastrum


2. Key to the Agastache Species

Section I: Agastache


A. Corolla tubes mostly less than 7,5 mm. long; calyx teeth deltoid or ovate, mostly 1-2 mm. long;
  mature spikes usually 1,5-2 cm. in diameter. Plants of the plains states of Canada and the United
  States, ranging eastwards to the Atlantic Coast

   B. Under surface of leaves minutley and densley tomentellous, feltlike, the upper quite glabrous;
      calyces hirtellous throughout, at least the teeth violet, rarley white........................A. Foeniculum

BB. Under surface of leaves glabrous, or if pubescent, not feltlike, the individual hairs evident;
     calyces glabrous, the teeth green, whitish or rose

      C. Calyx teeth ovate, obtuse, firm and more opaque than the tubes; corollas yellowish;
         spikes mostly 1,5 cm. in diameter or less...............................................................A. nepetoides

      CC. Calyx teeth deltoid and acute, rather than ovate and obtuse, thinner than the tubes,
           whitish or rose; corolla rose or purplish; spikes mostly 1,5-2 cm. in diameter.......A. scrophulariaefolia

AA. Corolla tubes mostly more than 8 mm. long (7-8 mm. rarley 10 mm. in A. rugosa); calyx teeth 
    deltoid-lanceolate, 2,5-7 mm. long, or deltoid and 1,5-4mm. long, mature spikes mostly 2-3 cm.
    in diameter. Plants of the Rocky Mountains and Pacific Coast, and southeastern Asia.

   B. Under surfaces of the leaves densely pubescent with minute hairs which form a feltlike covering
     similar to that of A. foeniculum, the individual hairs obscure, even when viewed with a lens.

        C. Leaf blades prevailingly 2-4 cm. broad, their margins narrowly inrolled; calyces glabrous
          or thinly hirtellous, the upper lips incised 2-4 mm., the teeth deltoid, 2-4 mm. long.
          Plants of Washington.............................................................................................A. occidentali

        CC. Leaf blades prevailingly 1-1,5 cm. broad, their margins plane; calyces densley 
           hirtellous, the upper lips incised 4-7 mm. the teeth lanceolate, 4-7 mm. long.
           Plants of the lava region of norteastern california..................................................A. parvifolia

    BB. Under surfaces of the leaves glabrous, or if pubescent, the individual hairs evident under
       a lens, hardly forming a feltlike covering, the pubescent forms confined to California and
       adjacent Nevada and southern Oregon, or Asiatic.

       C. Leaf blades prevailingly 1-1,5 cm. broad; calyx teeth deltoid-lanceolate,
           4,5-5,5 mm. long; plants apparently about 50 cm. tall, known only from
           Stein´s Mts. of southeastern Oregon.....................................................................A. Cusickii 

        CC. Leaf blades prevailingly 3-4 cm. broad; plants commonly a meter tall or more.

                D. Calyx teeth narrowly deltoid or deltoid-lanceolate, 3,5 mm. long, rarely
                    2,5 mm.; plants of the western united States................................................A. urticifolia

                DD. Calyx teeth narrowly deltoid, 1,5-2 mm. long, rarely 3 mm.; 
                    plants of eastern Asia....................................................................................A. rugosa


Section II: Brittonastrum


Zum Vergleich kann hier auf den Brittonastrum Schlüssel von Lint & Epling zugegriffen werden.



Bestimmungsschlüssel - key to the species - nach R.W. Sanders

Durch Anklicken der markierten Arten kann auf den Schlüssel für die Subspezies und Varietäten zugegriffen werden.


Corolla sizes are given as guides, not as absolute discriminating leads.
(Corolla-tube lengths: 2-5 mm = minute, 5,5-10,0 = dwarf, 9-12 = small, 12-19 = moderate, 18-28 = large)

1. Calyx-tube 1,5-3,0 mm long; upper calyx-teeth ca. 1,5 or more times longer than lower teeth; corolla-tube 5 mm or less long.

2. Leaf-blades membranous, mostly 2,5-3,0 times longer than broad; middle and upper inflorescence-internodes about equal to calyces; Upper calyx-teeth triangular, mostly 2,0-2,5 times longer than broad, only margins or upper 1/3 lacking chlorophyll; corollas white, tubes 2,5-3,5 mm long. ...........................A. micrantha

2. Leaf-blades herbaceous, mostly 1,5-2,0 times longer than broad; middle and upper inforescence-internodes mostly 2-4 times longer than calyces; upper calyx-teeth oblong-attenuate, mostly 3-5 times longer than broad, upper 2/3 lacking chlorophyll; corollas light violet to blue, tubes 3,5-5,0 mm long. ..........................A. wrightii

1. Calyx-tube (3-)4-10 mm long; upper calyx-teeth about equal or shorter than lower teeth; corolla-tube (5,5-)6-30 mm long.

3. Calyx-tube 0,5-1,5 mm (fresh) or 0,7-1,8 mm (pressed) in diameter at mouth during anthesis, (if diameter as much as 1,7 mm (fresh) pr 2,1 mm (pressed) then 1) costae straight and prominent given the calyx a rigid, plicate aspect, and 2) upper calyx-teeth 1,0-2,5(-3,0) times longer than broad, symetric, with connation-angle of 0-25 Grad, and 3) the corolla dwarf), calyc-tube urceolate in fruit with base swelling to larger diameter than mouth; secondary costae in calyx-teeth about equal to primary costa in thickness and usually indistinct from marginal cartilage.

4. Leaf-blades herbaceous, deltoid-ovate, 1,0-1,6 times longer than broad; calyx straight, upper teeth triangular or acuminate in upper 1/3, 1,0-2,5(-3,0) times longer than broad, secondary costae ending free; corolla dwarf. ...........................A. breviflora

4. Leaf-blades membranous, middle and upper ones triangular-lanceolate, 1,5-2,5 times longer than broad; calyx arching 5-15 Grad, upper teeth triangular-attenuate or concave in lower 1/3 and aristate above, 3-6 times longer than broad, secondary costae fusing with primary costa; corolla dwarf to moderate. .........................A. pringlei

3. Calyx-tube 1,7-4,0 mm (fresh) or at least 2,0 mm (pressed) in diameter at mouth during anthesis (if as little as 1,5 mm (fresh) or 1,7 (pressed) then, 1) the costae flexuous and not prominent, giving the calyx a leafy or papery aspect and upper calyx-teeth falcate with connation-angle of 35-70 Grad, or 2) upper calyx-teeth (3,0-)3,5-6,0 times longer than broad and corolla moderate to large), calyx-tube remaining cylindrical or campanulate in fruuit; secondary costae no grater than 1/2 the thickness of primary costa and easily distinguished from the marginal cartilage.

5. Upper calyx-teeth ca 1/10-1/4 of total length of calyx; apical margins of calyx-teeth rolled together and fused adaxially forming a terete, unifacial herbaceous tip, usually appearing to be an abaxial apical appendage or sometimes clearly cucullate; median lobe of corolla (4-)5-7 mm long. ........................A. pallida

5. Upper calyx-teeth ca. 1/4-1/2 of toatal length of calyx; apical margins of calyx-teeth not inrolled and fused to form an herbaceous, terete tip, the teeth flat, primary costa sometimes forming a raised abaxial keel or extending as a bifacial mucro or arista; median lobe of corolla usually 4 mm long or less long.

6. Stems suffrutescent with exfoliating bark at base; lower leaf-surfaces densley covered with matted slender hairs or minute conical papillae; inflorescences panicle-like cymes open with elongate scorpiod axes, the internodes of which are about equal to one another and to the pedicels they bear; corollas large

7. Stems simple or sparingly, divergently branched; Leaf blades crenate-serrate from base to, at least, 1/4 length from apex; upper calyx-teeth deltoid, about as broad as long; corollas golden-orange, median lobe broadly "Y"-shaped. .......................A. aurantiaca

7. Stems profusely, divergently branched; mature leaf-blades entire or subhastately crenate in lower 1/3; upper calyx-teeth triangular, 1,5-3,0 times as long as broad; corollas deep rose-pink to rosy orange, median lobe transversely elliptic-rhomboid.

8. Mature leaf-blades ovate to lanceolate or elliptic, 2-3 times longer than broad, undersurface minutely canescent with conical papillae; upper calyx-teeth triangular-acuminate, 2-3 times longer than broad; median lobe of corolla repand, nearly entire. ..........................A. cana

8. Mature leaf-blades lanceolate-linear, 6-15 times longer than broad, undersurface tomentulos with matted slender curled hairs; upper calyx-teeth triangular or concave-sided, 1,5 times longer than broad; median lobe of corolla sharply toothed to laciniate. ......................A. rupestris

6. Stems herbaceous, exfoliating bark, if present, only on underground portions of plant; lower leaf-surfaces glabrous to moderately densely hirsute with tapering, spreading to appressedhairs; inflorescences verticillastrate, cymes hemispheric with the internodes of the scorpiod axes (and likewise the pedicels) successively reduced outward from the central dichasium, or the scorpiod axes nearly obsolete with the flowers appearing whorled.

9. Inflorescences interrupted, middle and upper internodes 12-50 mm long, 1,5-4,0 times longer than the calyces; corollas large.

10. Calyx-tubes (3-)4-5 mm long, upper calyx-teeth subulate, (3,0-)3,5-6,0 times longer than broad; corollas orange-red, median lobe broadest near apex. ......................A. coccinea

10. Calyx-tubes 6-10 mm long, upper calyx-teeth long-triangular, 2,0-3,5(-4,0) times longer than broad; corollas pink or pinkish orange to red-purple, median lobe broadest near the base.

11. Leaf-blades triangular-lanceolate, at least the apical half of the margins entire; lateral calyx-teeth falcate; lateral corolla-lobes longer than broad, acute. .......................A. mexicana

11. Leaf-blades triangular-ovate, margins crenate to the apex; lateral calyx-teeth symmetrically triangular to abruptly acuminate; lateral corolla-lobes as broad as long, rounded, obtuse or abruptly acuminate. .............................A. pallida

9. Inflorecences more or less continuous, middle and upper internodes 2-8(-12) mm long, about equal to or much shorter than the calyces.

12. Plants 15-30 cm tall; leaf-blades lanceolate, apical 1/2-2/3 of margin entire; corollas moderate, median lobe with crowded, irregular, laciniate, elongate teeth. ..........................A. eplingiana

12. Plants 40-100 cm tall; leaf-blades ovate, crenate throughout or with no more than apical 1/4 of margin entire; median corolla-lobe entire to more or less regularly dentate-serrate, the teeth as broad or broader than long.

13. Calyces narrowly obconic, tube and teeth straight, costae very straight and prominent giving the whole calyx a plicate aspect; calyc-teeth usually triangular-acuminate with the convexity in the basal 1/3, primary costa extending as a stiff, attenuate arista, upper teeth 3,5-6,0 times longer than broad; corollas moderate, limb of median lobe trapezoidal or obtrapezoidal, consisting ot two longitudinally elongate, rounded lobes. .................................A. mearnsii

13. Calyces asymmetrically narrowly campanulate or arching-tubular, costae flexuous, bowed or arching, clearly so when prominent; calyx-teeth triangular-falcate ro triangular-acuminate with convexity in apical 1/3, primary costa not extending as an arista, if the upper teeth more than 3,5 times longer than broad, then strongly falcate; limb of median corolla-lobe semicircular, reniform or transversely ovate, often emarginate but not consisting of two elongate lobes.

14. Lateral calyx-teeth symmetrical, 2,0-3,3 times longer than broad; corolla-tubes usually 18-24 mm long, throat convexly inflated; median corolla-lobe 4-7 mm long. ............................A. pallida

14. Lateral calyx-teeth usually falcate, if not, then only about 1-2 times longer than broad; corolla-tubes usually 8-16 mm long, throat convexly inflated; median corolla-lobe 1,5-3,5 mm long.

15. Calyces narrowly, irregularly campanulate, longitudinal axis straight, not arching, but dorsal and ventral walls bowed (in side view); crossveins prominent, especially aften anthesis, 1/2 the thickness of secondary costae and often of primary costae; limb of median corolla-lobe deeply concave, 5-12 times longer than claw. .............................A. pallidiflora

15. Calyces tubular, clearly arching 10-30 Grad (in side view); crossveins obscure, only 1/4 or less the thickness of secondary costae; limb of median corolla-lobe shallowly concave, 3-5 times longer than claw. ...........................................A. palmerie

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zuletzt geändert: 10/11/2000