1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 295 



plant was collected by M. E. Jones in the Amargosa Desert of 

 southwestern Nevada and is described as follows: "A weak and 

 erect annual, much branched and stems tortuous but not climb- 

 ing; racemes long and loose; lowest leaves 1-3 inches long with 

 simple and linear lobes and petioled, the rest linear and entire; 

 the whole plant except the very base is a loose inflorescence 

 with straggling racemes; flowers minute, purplish-white, 1 line 

 long, calyx ashy and equalled by the slender and indifferently 

 spreading pedicel which in fruit elongates to 2 lines long; pods 

 6-9 lines long, acute at each end, arcuate, torulose, 1-2 lines 

 wide, apex very blunt; whole plant nearly smooth. This has un- 

 doubtedly been mistaken for Streptanthus longirostris." 



10. C. simulans Payson, n. sp. 1 



Annual, densely short-hirsute below, sparingly so above, more 

 or less glaucous: stem much branched from near the base and 

 upwards, 3-4 dm. high (in specimens seen): radical leaves un- 

 known ; lower cauline leaves oblong, ovate or lanceolate, sparsely 

 short-hirsute, especially on the margins and the midrib, sessile, 

 sagittate at the base, subentire or sinuate-dentate, 2-4 cm. long; 

 upper cauline leaves usually acute, entire or subentire, some- 

 what reduced: sepals yellowish, neither pair at all saccate, 5-6 

 mm. long, dorso-ventral pair narrower and slightly longer, 

 sparsely hirsute; petals whitish, broadly linear or narrowly spat- 

 ulate, somewhat crisped, 8-10 mm. long; filaments tetradynam- 

 ous, linear, sparsely hirsute, 3.5-4.5 mm. long, anthers not apicu- 

 late, about 2 mm. long: inflorescence racemose; pedicels hirsute, 

 somewhat recurved, 3-5 mm. long, rather stout: pods straight, 

 divaricate-descending, terete, sessile, glabrous, 4-6.5 cm. long; 

 style less than 1 mm. long, stigma definitely 2-lobed; septum 

 thin, cells rectangular: seeds not winged, oblong, cotyledons usu- 

 ally obliquely accumbent, rarely completely accumbent. 



Distribution: southern California. 

 Specimens examined: 



^aulanthus simulans sp. now, animus plus minusve glaucus; caule ramoso 

 inferno hirsutulo gracile 3-4 dm. alto; foliis caulinis oblongis ovatis vel lanceo- 

 latis hirsutulis sessilibus amplexicaulibus subintegris vel integria 2-4 em. longis; 

 sepalis subflavis non saccatis, fere similibus 5-6 mm. longis pilosiusculis, petalis 

 pallidis linen ribus spatulisve 8-10 mm. longis, filamentis tetradynamis 3.5-4.5 

 mm. longis; inflorescentiis floriferis laxis raeemosis, pedicellis hirsutis recurvulis 

 3-5 mm. longis; siliquis patento-reflexis rectis teretibus sessilibus glabris 4—6.5 

 cm. longis, stylo circiter 0.5 mm. longo, stigmate bilobo ; seminibus immarginatis, 

 cotyledonibus oblique incumbentibus. — Collected in Coyote Canyon, El Toro Moun- 

 tain, California, May 17-June 1, 1901, H. M. Hall 1894 (Univ. Calif. Herb., type). 



