This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Not Lindl. 1830.] Erect glabrate biennial or perennial herbs, with simple entire toothed or pinnatifid leaves, and racemose purplish or white flowers. Siliques nearly terete, linear, with a short stipe in some species; valves nerved, dehiscent; style short; stigma nearly entire. Seeds in 1 row in each cell of the pod, oblong, marginless; cotyledons obliquely incumbent. [Greek, female-stalk, from the stiped ovary.] . . A genus of about 18 species, natives of North America. All but the following occur only in the western part of the continent. Type species: Pachypodium laciniatum (Hook.) Nutt.
Pachypodium integrifolium Nutt.; T. & G. Fl. N. A. 1:
96. 1838. Thelypodium integrifolium Endl.; Walp. Rep. 1: 172.
Glabrous, erect, branching above, 3°-6° high. Leaves entire, thickish, the basal and lower ones petioled, narrowly oval or oblong, 2'-4' long, the upper or sometimes nearly all the cauline ones sessile, linear, lanceolate or oblong-lanceolate, acute or acuminate; flowers pink, in short dense racemes; pedicels slender, spreading, 2"-4" long; petals obo-vate or spatulate, long-clawed; pods narrowly linear, about 1' long and i" wide; stipe 1"-2 1/2" long; style slender, nearly 1" long.
Nebraska and Wyoming to Oregon, Utah and New Mexico. July-Sept.