240 LOASACE A, MENTZELIA. 
petals 5: filaments all filiform or the 5 outer more or less di- 
lated: capsule linear: leaves sessile, flat, sinuately toothed or 
pinnatifid: annuals. . 
M. albicaulis Dougl. Don Mill. iii, 61. Slender, 3-12 inches high or 
more: leaves linear-lanceolate, pinnatifid with numerous narrow lobes, 
the upper leaves broader and often lobed or toothed at base only: flowers 
mostly approximate near the ends of the branches: calyx-lobes 144-2 
lines long, a little shorter than the spatulate or obovate petals: filaments 
not dilated : capsule linear-clavate, 6-9 lines long: seeds numerous, rather 
strongly tuberculate, irregularly angled with obtuse margins less than 
half a line long. On sandy plains, Brit. Columia to California. 
M. dispersa Wat. Proc. Am. Acad. xi, 115 & 137. Stems slender annual, 
4-12 in. high, leaves narrowly lanceolate, sinuate-toothed or sometimes 
entire, the uppermost often ovate; flowers small mostly clustered near the 
ends of the branches; calyx lobes a line long, little shorter than the 5 
spatulate or obovate petals; capsule narrowly linear-clavate, 6-9 lines long ; 
seeds often in a single row, angular and somewhat rhombohedra!, more or 
less grooved upon the angles, very nearly smooth, half a line tong. East- 
ern Oregon to California. 
M. gracilenta T. & G. Fl. i, 534. Stems pubescent 12-18 inches 
high: leaves narrowly lanceolate muricate-scabrous, pinnatifid, the 
lobes short, obtuse: flowers usually clustered at the summit; calyx-lobes 
2-5 lines long; petals obovate to oblanceolate, 4-8 lines long, capsule 
linear clavate 6-12 lines long; seeds in three rows irregularly angled, 
minutely tuberculate. Idaho to California. 
M. congesta T. & G.1l.c. Slender, a foot high; leaves linear-lanceo- 
late, pinnatifid with numerous narrow lobes, the upper leaves broa er and 
often lobed or toothed at base only: flowers clustered at the ends» of the 
branches, conspicuously bracted with broad toothed bracts, which ate 
membranaceous at base: calyx-lobes 144-2 lines long: petals bright orange, 
3-6 lines long: filaments all filiform: capsule clavate, half an inch long: 
seeds irregularly angled, minutely tuberculate, nearly a line long. Inter- 
ior of Oregon to California and Nevada. . . 
§ 2. Barrontra T. & G. FI. i, 5385. Seeds numerous in 
double rows upon the 8 broad placente, horizontal, flattened, 
suborbicular-winged, minutely tuberculate or nearly smooth: 
flowers often large and showy: calyx-limb 5-cleft nearly to the 
base: petals 5 or'10: filaments numerous, the outer often more 
or less dilated or petaloid: capsule broad, oblong: leaves sessile, 
sinuately toothed or pinnatifid: biennials. 
M. levicaulis T. & G. 1. c. 535. Stout 2-3 ft. high, branching: leaves 
lanceolate, 2-8 inches long: flowers sessile on short branches, very_ large, 
light yellow, opening in sunshine: calyx-tube naked, the lobes 12-15 lines 
long: petals acute at each end, 2-2! inches long, the filaments and slender 
style a little shorter: capsule 15 lines long, 3-4 lines in diameter: seeds 
very, minutely tuberculate. On gravelly bars, Brit. Columbia to Cali- 
ornia. 
M. Brandegei Watson Proc. Am. Acad. xx, 367. Stem branching, a foot 
high: leaves linear, pinnatifid with narrow lobes, 1-3 inches long; the 
bracts on the short pedicels mostly entire, very narrow: flowers in open cor- 
mbs: calyx-lobes 6-8 lines long, the 5 narrowly oblanceolate petals an inch 
ong or more: stamens about 30,a little shorter, none petaloid: capsule 
narrowly oblong, 7-9 lines long by nearly 3 lines wide: seeds horizontal, 
flattened, with somewhat. angular or rugose sides and narrow scarcely 
winged margin. Yakima County, Washington. 
