Thehj podium. CRTiriFER/K. 3"^ 



10. THELYPODIUM, Kn.ll. 

 Pdd liiioar or eloiif^atcil, torcto or sli-^'htly c-oniprcsscd, scssilo or sliort-stipitate ; 

 valves strongly l-jierved. Seeds in one row, ohlong, sonjcwhat flattened, not 

 winged ; cotyledona more or less incumbent. Sepals narrow, ecpial at base. Petals 

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

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

 entire. — Probably all biennials, mostly stout and coai-stv — Watson, Bot. King 

 Exp. 'if). Parhi/podinm, Nutt. in Torr. k Cray, Ki. i. 9(1 ; iJentli. it Hook. (len. 

 Pi. i. 81. 



A genu.s of tnii icfjogiiizml spcnira, rliicfly ''oiifineii to tlic western coast anrl interior l>asin, a 

 single species occurring in Texa.s and the Atlantic States. The Mexican Horn probably includes 

 some otners. 



* Leaves alt entire : xtipe obsolete 07- very short : filaments scarcely exserted : glabrous. 



1. T. integrifolium, Endl. Stout, 3 to G feet high, branched at tlie summit, 

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

 long-potiolod ; caulino 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 2| lines long; petals spatulate-obovate, pale rose- 

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

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

 Nutt. 1. c. ; Hook. & Am. P.ot. P.rechey, 321, t. 74. 



Kdgn of the Mohave Divscrt (Hrcrmann), and frp(iucnt on the ca-strrn side of the Sierra Nevada 

 from Orog<in to the ITppor Missouri and New Mexico. 



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

 loosely branched : leaves somewhat glaucous, the radical long-i)etioled, lanceolate, 3 

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

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

 fruit: pod 1 to 2 inches long, somewhat tonilose, acuminate with the rather long 

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

 — Watson, 1. c. Pachypodinni sagittatum, Nutt. 1. e. 



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

 Wyoming ; doubtless in the northeastern portion of the State. 



3. T. Nuttallii, Watson, 1. c. Resembling the last, but stouter and more erect, 

 3 to f) feel higli: radical leaves ovate, long-potioleil, often 6 to 8 inches long; the 

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

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



In similar localities, from the Blue Mts., Oregon (^Ncvius), and Southern Idaho (Xuttall) to 

 Nevada ami Utah {Jfatson) and Arizona, Ives. 



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



erserted (except in iVo. G and 7) : hirsute at base (glabrous in iVo. 5). 



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

 5 feet high : leaves smootli or somewhat hairy, the radical oblanceojate or spatulate, 

 pinnatilid or toothed; stem-lcavos 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 linos long, acuminate with the slender stvle, ascend- 

 ing on short pedicels. — Hot. Wilkes Exp. 231. t. 1. 



Mono I'assand near Mono Lake (/f)r;wr) and northward to the Tru<kco nivrr(r"rm/, Bailey) ; 

 fii-st collected by /'irkrriiifj, prolwbly on tin- Upj)er Sacramento. 



n. T. laciniatum, ImkII. Ciabrous: stem stout, erect. 1 fo T) feet high, simple 

 or brandling : leaves ail p<>tioled. 3 to G inches long or mon\ lanceolate to broadly 



