Thelypodium. CRUCIFERJ5. Q»7 



10. THELYPODIUM, Endl. 



Pod linear or elongated, terete or slightly coniprcssed, sessile or short-stipitate ; 



valves strongly 1 -nerved. Seeds in one row, oblong, somewhat flattened, not 



winged ; cotyledons more or less incumbent. Sepals narrow, equal at base. Petals 



with a narrow claw and flat linear to orbicular limb, exserted, white or rose-color. 



Anthers linear, sagittate at base, curved ; filaments often exserted. Stigma mostly 



entire. — Probably all biennials, mostly stout and coarse. — Watson, P>ot. King 



Exp. 25. Pachypodium, Kutt. in Torr. & Gray, Fl. i. 96 ; Benth. & Hook. Gen. 



PI. i. 81. 



A genus of ten recognized species, chiefly confined to the western coast and interior basin, a 

 single species occurring in Texas and the Atlantic States. The ilexican flora probably includes 

 some others. 



* Leaves all entire : stipe obsolete or very short : filaments scarcely exserted : glabrous. 



1. T. integrifolium, Endl. Stout, 3 to 6 feet high, branched at the summit, 

 often corymbosely : radical leaves large (often a foot long or more), oblong-elliptical, 

 long-petioled ; cauline leaves mostly narrowly lanceolate, 1 to 2 inches long, sessile, 

 ascending, the uppermost linear : flowers crowded and almost corymbose at the end 

 of the branches; sepals 1| to 2i lines long; petals spatulate-obovate, pale rose- 

 color : fruiting racemes short and crowded ; pod 6 to 15 lines long, somewhat toru- 

 lose, acuminate with the slender style. — Watson, 1. c. Pachypodium integrifolium, 

 Nutt. 1. c. ; Hook. & Arn. Bot. Beechey, 321, t. 74. 



Edge of the Mohave Desert {Hecrmann), and frequent on the eastern side of the Sierra Xevada 

 from Oregon to the Upper Missouri and New Mexico. 



2. T. sagittatum, Endl. Stems weak, rarely erect, 12 to 18 inches high, 

 loosely braixclied : leaves somewhat glaucous, the radical long-petioled, lanceolate, 3 

 to 4 inches long ; cauline leaves sagittate and clasping : petals pale pink, 3 to 5 

 lines long, twice longer than the purplish calyx : the loose raceme elongated in 

 fruit : pod 1 to 2 inches long, somewhat torulose, acuminate Avith the rather long 

 style, spreading, on pedicels 3 to 6 lines long : cotyledons often nearly incumbent. 

 — Watson, 1. c. Pachypodium sagittatum, Nutt. 1. c. 



Under bushes in alkaline localities, from Carson and Truckee Valleys, Nevada, to Western 

 Wyoming ; doubtless in the northeastern portion of the State. 



3. T. Nuttallii, AVatson, 1. c. Eesembling the last, but stouter and more erect, 

 3 to 5 feet high : radical leaves ovate, long-petioled, often 6 to 8 inches long ; the 

 cauline lanceolate, sagittate : petals and calyx bright purple, rarely whitish : seed 

 flatter and cotyledons nearly accumbent. — Streptanthus sagittatus, Xutt. 



In similar localities, from the Blue Mts., Oregon (Nevius), and Southern Idaho (XiMall) to 

 Nevada and Utah ( JFatson) and Arizona, Ives. 



* * At least the radical leaves toothed or pinnatifid : stipe manifest : filaments long- 



exserted {except in No. 6 and 7) : hirsute at base {glabrous in No. 5). 



4. T. brachycarpum, Torr. Stem usually erect, virgate, rarely branching, 1 to 

 5 feet high : leaves smooth or somewhat hairy, the radical oblanceolate or spatulate, 

 pinnatifid or toothed; stem-leaves erect, narrow, sagittate and clasping, entire or 

 sparingly toothed : flowers in a long crowded raceme : petals narrowly linear, white, 

 3 to 4 lines long : pod 9 to 12 lines long, acuminate with the slender style, ascend- 

 ing on short pedicels. — Bot. Wilkes Exp. 231, t. 1. 



Mono Pass and near Mono Lake (Brewer) and northward to the Truckee 'RWqv {Torrcy, Bailcii) ; 

 first collected by Pickering, probably on the Upper Sacramento. 



5. T. laciniatum, Endl. Glabrous : stem stout, erect, 1 to 5 feet high, simple 

 or branching : leaves all petioled, 3 to 6 inches long or more, lanceolate to broadly 



