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Agastache

Bestimmungsschlüssel / Key to Section Brittonastrum species
nach Lint & Epling




A. Corolla tubes 2,5-5 mm. long; calyx tubes 2 mm, long or less

    B. Spikes interrupted , moniliform, the whorls distinct; leaves deltoid, tending to be
        abaout twice as long as broad; corollas rose purple, the tubes 3-5 mm. long. ...........A. Wrightii

    BB. Spikes more or less continuous, the lower whorls often distinct but the upper approximate
        or crowded; leaves narrowly deltoid or deltoid-lanceolate, tending to be about three times
        as long as broad; corollas white, the tubes 2,5-3 mm. long. ......................................A. micrantha

AA. Corolla tubes 6-30 mm. long; calyx tubes usually more than 3 mm. long.

       B. Leaves either wholly entire, or, if toothed toothed only toward the base, the upper margins
        entire, such toothed leaves being chiefly basal; corolla tubes 15-30 mm. long (if Mexican
        plants see also A. mexicana).

          C. Leaves linear or linear-lanceolate, always entire, generally less than
             5 mm. broad. ............................................................................................................A. rupestris

          CC. Leaves ovate or ovate lanceollate, sometimes toothed, and if so, usually near the
               base. generally more than 5 mm. broad...............................................................A. cana

    BB. Leaves crenate or serrate

          C. Lower surfaces of  leaves tomentellous with minute hairs, feltlike; corolla
              tubes about; 26 mm. long. Plants of Chihuahua....................................................A. aurantiaca

          CC. Lower surfaces of  leaves glabrous, or if pubescent, the hair not feltlike,the
               individual hairs evident.
                 D. Corolla tubes 19 mm. long or more

                      E. Calyx tubes 4-5 mm. long...............................................................A. coccinea

                      EE. Calyx tubes  6,5-11,5 mm. long

                         F. Upper lip of calyces usualyy 2,5.4 mm. long; leaves mostly deltoid
                             and crenate througout; calyces usually deep rose-purplle throughout;
                             stems from a woody caudex; plants ranging from Durango
                             northward to Arizona...........................................................................A. Barberi

                         FF. Upper lip of calyces usually 3,5-6 mm. long; leaves deltoid
                             lanceolate and often serrate only below the middle; stems from
                             creeping rhizomes; plants ranging from Zacatecas southward
                             to Puebla...............................................................................................A. mexicana

              DD. Corolla tubes usually less than 18 mm. in length.

                        E. Calyces 8 mm. long or less (see also A pallidiflora).

                              F. Corollas 15-18 mm. long, twice the length of the calyces, 
                                slender...............................................................................................A. Pringlei

                             FF. Corollas 12 mm. long or less, the tube but little excerted 
                                beyond the calyx teeth.......................................................................A. breviflora

                        EE. Calyces 8-10 mm. long, or if shorter, then Texan plants; corollas
                           mostly 11-18 mm. long.

                             F. Plants of eastern Mexico from Nuevo Leon to Vera Cruz....A. Palmerie

                            FF. Plants of the southwestern United States and adjacent Mexico,
                                 southward to Durango.

                                  G. Corollas usually about twice as long as the calyces, their
                                      tubes 13-18 mm. long; calyces deep rose purple; calyx
                                      teeth subulate, very acute, 3-4 mm. long; plants ranging
                                      from S. Arizona to durango.....................................A. pallidiflora subsp. Mearnsii

                                  GG. Corollas usually not more than half as long as the calyces,
                                      or if twice as long, the calyx teeth deltoid, 1-2 mm. long;
                                      calyces rose color or green.

                                          H. Calyx tubes 5-8 mm. long; Texas plants the teeth usually
                                              tending to flare somewhat.................................................A. p. subsp. Havardi

                                          HH. Calyx tubes 5-8 mm. long, the teeth seldom tending to flare.

                                                       J. Calyces green, with whitish teeth, the corollas pallid                  
                                                          or whitish................................................................A. p. subsp. typica
   
                                                        JJ. Calyces rose, or if green, usually with rose colored teeth;                
                                                          corollas rose...........................................................A. p. subsp. neomexicana

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zuletzt geändert: 10/11/2000