phacelia HYDROPHYLLACE.E 467 



erous valves, or sometimes falling away. 



2 PHACELIA Juss. Gen. 127. 



Annual or perennial herbs with alternate simple or compound 

 leaves, and more or less scorpioid cymes, or so called spikes or 

 racemes, of blue purple or white flowers Calyx-lobes all similar 

 or nearly so, more or less enlarging in fruit, deciduous, at least 

 thrown off by the enlarging capsule, except in P. sericea; the tube 

 with or sometimes without appendages within: these when present 

 generally in the form of 10 vertical folds or lamellar projections in 

 pairs either adnate to or free from and alternate with the base of 

 the slender filaments. Stamens equally inserted low down on the 

 corolla. Ovules and seeds when reduced to a pair collateral and 

 nearly as long as the cell. Seed-coat reticulated or pitted. 



§ Euphacelia B. & H. Gen. ii, 818. Lobes of the campanu- 

 late corolla entire ; the tube with 10 laminate appendages in pairs 

 at the base of the stamens. Ovules a pair to each placenta. 

 Seeds as many as ovules, or by abortion fewer, areolate-reticulate 

 or favose. 



* Lower leaves and all the branches opposite: spikes or branches 

 of the cyme hardly at all scorpioid : pedicels shoiter than the calj-x. 



P. Pringlei Gray Pre. Am. Acad xvii, 223. Stem slender, 2-6 inches 

 high from an annual root, glandular and pubescent : leaves linear-lanceolate, 

 entire, tapering at base, obscurely petioled, only the uppermost alternate: 

 calyx-lobes linear, 3 lines long, about half as long as the very open-cam- 

 panulate blue corolla, longer than the globose capsule : seeds angled and 

 not hollowed ventrally. Un the mountains of southern Oregon and north- 

 ern California. 



* Pubescence or some of it hispid or hirsute : spikes or branches of 

 the cyme scorpioid and dense: pedicels short or hardly any: appen- 

 dages of the corolla broad and salient, usually more or less united at 

 the base of the filaments. 



■*- Leaves all simple and entire, or some of the lower pinnately 

 3-5-parted or divided; the segments or leaflets entire: capsule ovate, 

 acute: seeds densely alveolate-punctate, the upper end acutish. 



P. nemoralis Greene Pitt, i, 141. Perennial, often flowering the first 

 year from seed, 2-6 feet high s'out, loosely branching; hispid throughout 

 and destitute of canescent pubescence: leaves simple and entire or the 

 lower ones more or less lobed or parted at the base, ovate-oblong, 2-6 

 inches long, petiolate, rugose and without conspicuous parallel veins; ra- 

 cemes geminate, short and spreading, slender but not loose: corolla small, 

 greenish-yellow : stamens exserted : fruiting calyx round-ovate or nearly 

 globose; the oblanceolate calyx-lobes spreading away from the (apsule be- 

 low, connivent over it above : seeds 2, (the other 2 ovules always abortive,) 

 ovate, acutish, deeply pitted, dark brown. In rich alluvial soil, Washing- 

 ton to Calif orn a. 



P. mutabilis Greene Eryihea iv, 55. " Biennial, erect, slender, 10 

 to 18 inches high, not much branched, sparingly leafy, the radical leaves 

 few and ascending, not forming a depressed tuft, sparsely hirsute through- 

 out, and with a short somewhat villous pubescence beneath the hirsute: 

 leaves of thin texture, mostly entire and simple, elliptic, acute, some of 

 the radical with a pair of pinna? at the summit of t l e slender petiole : ra- 



