|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|Family: Apocynaceae||View Description||Dichotomous Key|
|Genus: Amsonia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Amsonia tomentosa Torr. & Frém.
Habit: Plant glabrous or gray-tomentose. Stem: several to many from woody crown, 16--36 cm, branches few to many. Leaf: 2--4 cm; petiole short or 0; blade ovate-lanceolate, acute at both ends. Flower: calyx lobes erect, thread-like above base; corolla +- white, blue, or +- green, tube +- 15 mm, inflated above middle, narrowed just below spreading lobes; style with spheric thickening just below stigma. Fruit: 3--8 cm, constricted between seeds, often breaking into 1-seeded segments. Chromosomes: 2n=22.
Ecology: Desert plains, canyons; Elevation: 300--1800 m. Bioregional Distribution: SnBr (n slope), D; Distribution Outside California: to Utah. Flowering Time: Mar--May Note: Tomentose and glabrous plants (latter assignable to Amsonia brevifolia A. Gray) have identical ranges, do not intergrade, and show no other differences, suggesting hairiness is governed by a single gene.
Synonyms: Amsonia brevifolia A. Gray; Amsonia tomentosa Torr. & Frém. var. tomentosa
eFlora Treatment Author: Thomas J. Rosatti & Lauramay T. Dempster
Jepson Online Interchange
Previous taxon: Amsonia
Next taxon: Apocynum
Citation for this treatment: Thomas J. Rosatti & Lauramay T. Dempster 2017. Amsonia tomentosa, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=13179, accessed on February 20, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 20, 2017.