. Synoptical flora of North America. Botany; Gamopetalae. PJiacelia. 169 P. pusilla, Torr. Very small, not over 3 inches high, simple or loosely branching, glan- dular-pubescent : leaves broadly oval or oblong, entire, a quarter to half an inch long: flowers few in a loose raceme, on filiform pedicels : corolla white, not twice the length of the narrow linear or obscurely spatulate calyx-lobes : capsule narrow-oblong, obtuse and mucronulate, 18-24-seeded. — ^^'atson, Bot. King, 2G3; Gray, 1. c.— Western part of Nevada to the borders of California, " under sage-brush and j
. Synoptical flora of North America. Botany; Gamopetalae. PJiacelia. 169 P. pusilla, Torr. Very small, not over 3 inches high, simple or loosely branching, glan- dular-pubescent : leaves broadly oval or oblong, entire, a quarter to half an inch long: flowers few in a loose raceme, on filiform pedicels : corolla white, not twice the length of the narrow linear or obscurely spatulate calyx-lobes : capsule narrow-oblong, obtuse and mucronulate, 18-24-seeded. — ^^'atson, Bot. King, 2G3; Gray, 1. c.— Western part of Nevada to the borders of California, " under sage-brush and junipers," ^'(itson. Corolla hardly but capsule fully 2 lines long. Seeds somewhat pyriform, roughish-scrobiculate. Pedicels 1 to 5 lines long. ++ -w- -H- Flowers loosely racemose in fully developed inflorescence: calyx shorter than the cam- paiuilate corolla, rather lonj^t;r than the short-pointed capsule : leaves rouad-cordate and crenately lobed or repand, obscurely palmately veined. P. rotundifolia, Torr. Diffusely branched, 2 to 4 inches high, glandular-hirsute : leaves crenately 7-13-toothed or even lobed, mostly with a deep-cordate base (a quarter to a full inch long), usually much shorter than the petiole; pedicels shorter than the hnear-spatula te calyx-lobes : corolla white : style obscurely 2clLf t at apex : capsule oval-oblong, abruptly pointed, 60-100-seeded. — Watson, Bot. King, 2-3o; Gray, 1. c. — S. E. borders of CaUfornia, near Fort llohave, to S. Vtah and Arizona, Cooper, Palmer, Parry. Corolla 2 lines long. Capsule 2 lines long. Seeds globular, scrobiculate. § 7. MiCROGEXETES, Gray. Ovules and seeds of the preceding section ; but the latter oblong and strong!)' corrugated transversely (vermiculiform !) : style 2-cleft only at the apex : stamens unequal, included: corolla with internal appen- dages present or rarely wanting: low annuals, all W. American: leaves mostly pinnatifid. — Proc. Am. Acad. x. 326. # CoroUa short, almost rotate; the appen
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