21 



]yx, -often, with the other parts of the 

 fl, much reduced. Baja Cal. to Lake 

 Co., Cal., on dry hills near the coast. 

 HELIAXTHEMTJM ALDERSONIlGreene 



"Somewhat woody at base, the tufted 

 and more or less tortuous stems a yard 

 high or less, leafy below, almost naked 

 at the panicled summit, both stem and 

 leaves of a vivid green and only 

 sparsely stellate-pubescent: leaves lin- 

 ear-lanceolate, 1% inches long, with 

 closely revolute narrow margin, and 

 acute narrow midvein beneath: panicle 

 6 or 8 inches long; pedicels and calyces 

 rather densely pubescent: larger sepals 

 3 or 4 lines long, abruptly pointed: pet- 

 als % inch long: stamens about 25. Mts. 

 of the southern borders of San Diego, 

 Co., Calif., among rocks in hard and 

 sterile granitic soil |R. D. Alderson)." 

 Greene Erythea 1:259. 

 SILEXA SIMULAXS Greene. 



"Inflorescence viscid-pubescent, the 

 herbage otherwise glabrous and dark 

 green: .stems a foot or two high, de- 

 cumbent, from a thick fusiform per- 

 pendicular root: leaves narrowly linear- 

 lanceolate, 2-3 inches long, the inter- 

 nodes short on the lower part of the 

 stem and the axils bearing ovate scaly- 

 bracted bulblets: flowers somewhat 

 nodding, in a cymose panicle, deep 

 scarlet: petals deeply 4-cleft, the upper 

 2 at right angle with the calyx, the 

 other 3 parallel with it, appendages 

 erose: stamens declined: seeds strongly 

 tuberculate on the back. Islands of 

 Santa Cruz and San Miguel." Greene, 

 Pittonia 1:63. 



81 LENA ANTIRRHINA Linn. 



Stem 6 in. to 3 ft. high: leaves ob- 

 long-lanceolate or linear, commonly 

 acute: fls rather numerous, small, 

 ephemeral, borne in a compound cyme; 

 pedicels long, filiform: calyx smooth, 

 green, ovoid in fruit, about 4 lines 

 long, contracted above: the teeth 

 short: ovary scarcely stiped: petals 

 small, pink or white, more or less 

 emarginate or bifid. TVaste places, 

 widely distributed, very variable in 

 size and foliage. 

 SILEXA OALLICA Linn. 



Stem hirsute with white jointed 

 hairs: leaves spatulate, obtuse, mucro- 

 nate. hirsute-pubescent on both sides, 

 8-18 lines long: racemes terminal, 1- 

 sided, 2-4 in. long: fls more or less ped- 



icellate: calyx 10-nerved, villous-hir- 

 sute, slender and subcylindric in an- 

 thesis, becoming in fruit broadly ovoid, 

 with contracted orifice and short nar- 

 row spreading teeth: petals usually 

 little exceeding the calyx; the blade 

 obovate, somewhat bifid, toothed or en- 

 tire. Xow cosmopolitan; British Co- 

 lumbia to Baja Cal. Europe. 

 8ILENA LACINIATA Car. 



Finely pubescent: root narrowly fu- 

 siform: stems erect or decumbent, 

 somewhat rigid, knotty below; the 

 branches ascending: leaves lanceolate 

 to narrowly linear, scabrous, ciliolate, 

 narrowed to a sessile base: fls terminal 

 on the branches: calyx subcylindric or 

 clavate even in fruit, 10 lines long: pet- 

 als bright scarlet, 4-cleft or very rarely 

 bifid: capsule oblong scarcely at all 

 ovate, commonly exserted at maturity. 

 Central California to New Mexico. 



SILENA CALIFORNICA Dur. 



Root simple, strong, penetrating ver- 

 tically to a depth of 2-3 ft.: stems sev- 

 eral, procumbent or suberect, leafy: 

 leaves lanceolate or ovate elliptic, 

 more or less narrowed to the base, ac- 

 uminate, rarely obtusish: corolla more 

 than an inch broad; petals variously 

 cleft, most commonly with 2 broad 

 lobes flanked by 2 narrower ones: cap- 

 sule ovoid, concealed until dehiscence 

 by the rather broad calyx. Oregon to 

 San Diego. Cal. 

 SILEXA PALMERI S. Watson. 



Similar in habit to S. longistylis, 

 more or !ess pubescent throughout, 

 finely glandular above: leaves oblan- 

 ceolate: calyx teeth commonly short 

 and blunt, scarcely herbaceous; base 

 of calyx often contracted about the 

 short but distinct stipe of the ovary: 

 petals purplish: claw villous, narrowly 

 or broadly spatulate but not auricu- 

 late: limb deeply 4-cleft: segments en- 

 tire or bifid: seeds large for the genus, 

 tuberculate, ash-colored at maturity. 

 Cuyamaca (Palmer). San Bernardino 

 mts. (Parish).' San Rafael mts. (Ford). 

 SILEXA PLATYOTA S. Watson. 



Minutely pubescent throughout, 

 glandular above: root thick: stems 

 slender, l 1 /^ ft. high: leaves oblanceo- 

 late. acute. narrow r ed below to winged 

 ciliated petioles: inflorescence branch- 

 ed: fls borne singly, or in the .stronger 

 individuals somewhat fascicled at the 



