450 BOTAISTT. 



§ 2. SiEROEHiNUM, Gray. Palate prominently protruded, not closing the throat or scarcely ; fila- 

 ments more or less dilated at top; capsule unequal ; seeds as in AnlirrUnastrum. Annual herbs 

 mostly with alternate leaves, strict, or diffuse and bearing filiform often twining brancWets ; pedi- 

 cels short or none ; flowers nearly always small. Californian, excepting A. Kingii. 



» Stems erect, strict, simple or simply branched at base, with axillary flowers from the base to the 

 top, without branchlets ; leaVes oblong-linear, obtuse, somewhat petioled, similar, mostly exceed- 

 ing the small nearly sessile flowers ; calyx subequal, segments linear ; capsule beaked by the 

 rigid subulate style. 



3. A. COENUTUM, Beuth. Viscid-villous, subglandulose, about 1° high, branched at base ; corolla- 

 tube longer than the calyx and its lips, the sac prominent and scrotiform ; filaments all obliquely obo- 

 vate-dilated above ; style a little longer than the capsule ; seeds eohinulate-favose.— Sacramento Valley, 

 (1888 Hartwcg.) 



4. A. lEPTALEUM, Gray. Viscid-villous, scarcely at all glandular ; stem 1^° high, very simple or 

 sparingly branched at base ; corolla apparently white, the tube aj" long, scarcely exceeding the calyx, 

 about equaling the lips, upper lip deeply bifid, the nearly equal lobes obovate, slightly erose-crenulate ; 

 sac narrow, scrotiform ; the longer filaments obliquely obovate-dilated above, the shorter scarcely 

 dilated ; style about equaling the capsule ; seeds rugose-pitted. 



* * Flowers more densely spicate, exceeding the diminished floral leaves ; leaves narrow, mostly 

 sessile ; stems erect, branched, with twining branchlets in A. Coulterianttm. 



5. A. ViRGA, Gray. Glabrous ; stem very simple, strict, over 2° high ; oauline leaves very narrowly 

 linear, suberect, the floral ones small, subulate-setaceous, equaling the calyx ; racemes spike-like, 

 virgate, densely flowered, about 1' long ; flowers secund, at length horizontal ; corolla J' long, the 

 cylindric tube twice longer than the lips and the scarcely unequal ovate-lanceolate to subulate calyx- 

 segments, sac mammseform, palate bearded, lobes very short ; filaments viscid-hirsute, the longer ones 

 especially with the dilated apex broader than the anthers. — 191 Bridges. 



6. A. GLANDTJLOSUM, Lindl. Tall, very viscid throughout with glandular hairs, widely branched; 

 leaves lanceolate, the floral ones little shorter than the flower ; racemes spike-like ; corolla rose-colored, 

 over 6" long, the broad tube a little longer than the equal lips and the unequal broad-lanceolate calyx- 

 segments ; filaments alike, slightly dilated upward ; style long ; seeds fimbrillate-pitted. 



7. A. CouLTEEiANUM, Benth. Stem slender, 2-4° high, glabrous, erect or climbing ; leaves glabrous, 

 linear or the lower oblong, subpetioled, the floral ones minute ; raceme spike-like, crowded, viscid-pilose, 

 usually glandular ; corolla- tube a little exceeding the calyx-segments, sac large and mamniieforra, the 

 lower lip very large, twice longer than the tube, the upper small, very spreading, bifid ; filaments 

 dilated upward ; style persistent, half shorter than the capsule ; seeds pitted.-^S. California. 



* * * Flowers scattered along the diffuse branches, and usually with filiform sometimes twisted and 

 prehensile branchlets from the same axils ; leaflets petioled, mostly exceeding the flowers ; calyx 

 unequal, the upper sepal larger. 



(a.) Peduncles longer than the calyx; filaments gradually dilated upward. 



8. A. NtJTTALLiANUM. Benth. Viscid-pubescent ; leaves ovate or the lowest subcordate, the upper 

 floral ones shorter than the flower; calyx-segments subovate, the upper nearly nerveless, moderately 

 larger than the rest, little shorter than the tube of the violet (4-5" long) corolla; lips longer than the 

 tube, the upper suberect, 6marginate-2-lobed, equaling the palate ; seeds longitudinally undulate-cos- 

 tate. — S. California. 



(1).) Peduncles shorter than the calyx ; filaments obliquely spatulate-dilated above ; calyx hirsute 

 with long loose hairs. 



9. A. Brbwbki, Gray. Finely viscid-pubescent; branches very slender; leaves ovate- or oblontr- 

 lanoeolate, obtusish, the tipper retuse, the highest shorter than the flower, (in Var. ovalipolium oval, 

 retuse, the upper emarginate, on the branches small and rounded;) calyx-segments linear or linear- 

 lanceolate, (or oblong,) the upper slightly broader, sub-1-nerved, a little shorter than the corolla-tube ; 

 corolla 5-6" long, pale-violet, upper lip small, nearly 2-parted, the lobes oblong, divergent ; seeds irreg- 

 ularly tuberoulate. — K. California. 



10. A. VAGANS, Gray. Hirsute with spreading rather rigid sometimes glandular hairs, or glabrate; 

 leaves lanceolate or oblong, sometimes linear or rounded on the branches ; calyx-segraents very unequal 

 the upper narrow- or broad-oblong, (sometimes broad-oval,) very obtuse, 3-5-nerved, equaling the corolla- 

 tube, the rest linear ; corolla 6-8" long, purple (?), sac ample, upper lip 2-lobcd, equaling the palate ; 

 seeds irregularly tuberculate. See page 216, and Plate XXI, 



11. A. Kingii, S. Watson. Flowers and fi-uit half as large ; capsule nearly globose, tipped with 

 the short straight style. See page 215, and Plate XXI. 



