HYDROPHYLLACE^. (WATERLEAF FAMILY.) 369 



2. E. ambigua, Nutt. Later peduncles sometimes 2 - 3-flowcred ; corolla 

 rather more bell-shaped, the upper part of tube 5-angular : otherwise like the 

 preceding, of which it is probably a variety. — Illinois and westward. 



4. PHACELIA, Juss. ( Phacelia & Eutoca, R. Br. ) 



Calyx 5-parted ; the sinuses naked. Corolla open- bell-shaped, 5-lobed; the 

 lobes imbricated in the bud. Filaments slender, often (with the 2-cleft style/ 

 exserted: anthers ovoid or oblong. Ovary with 2 narrow linear placenta ad' 

 herent to the walls, in fruit usually projecting inwards more or less, the two 

 often forming an imperfect partition in the ovoid 4 - many-seeded pod. (Ovules 

 2 - 30 on each placenta. ) — Perennial or mostly annual herbs, with either simple, 

 lobed, or divided leaves, and commonly handsome (blue, purple, or white) flow- 

 ers in one-sided raceme-like clusters. (Name from (patceXos, a fascicle.) 



§ 1. PHACELIA. Seeds and ovules only 4 {two on each placenta) : corolla with 

 narrow folds, appendages, or scales within, the lobes entire. 



1. P. bipinnatiflda, Michx. Biennial; stem upright, much branched, 

 hairy (1° -2° high) ; leaves long-petioled, pinnately 3 - 5-divided ; the divisions 

 or leaflets ovate or oblong-ovate, acute, coarsely and often sparingly cut-lobed 

 orpinnatifid; racemes elongated, loosely many-flowered, glandular-pubescent; 

 pedicels about the length of the calyx, spreading or recurved. — Shaded banks, 

 in rich soil, Ohio to Illinois and southward. May, June. — Corolla bright blue, 

 6" broad, with 5 pairs of longitudinal folds, covering as many externally keeled 

 deep grooves. Stamens bearded below; these, with the style, are either some- 

 what included (P. brevistylis, Buckley) or exserted in different individuals. 



§2. COSMANTHUS. (Cosmanthus, Nolte. Sect. Eucosmanthus, A. DC, 



in part.) Seeds and ovules only A: corolla naked within; its lobes beautifully 

 fringe-toothed : filaments villous-bearded below : leaves pinnatifid, the upper clasp- 

 ing at the base: flowers long-pedicelled : annuals or spring biennials. 



2. P. Purshii, Buckley. Sparsely hairy ; stem erect or ascending, branched 

 (8' - 12' high) ; lobes of the stem-leaves 5-9, oblong or lanceolate, acute ; raceme many- 

 flowered; calyx-lobes lance-linear ; corolla light blue, varying to white (about £' in 

 diameter). (P. fimbriata, Pursh., not of Michx. Cosmanthus fimbriates; 

 Nolte, Src.) — Moist wooded banks, W. Pennsylvania to Illinois and southward. 

 April - June. 



3. P. fimbriata, Michx. Slightly hairy, slender; stems spreading or as- 

 cending (5' -8' long), few-leaved; lowest leaves 3 -5-divided into roundish leaf- 

 lets ; the upper 5 - 7-cleft or cut-toothed, the lobes obtuse; raceme 3 - \0-flowered; 

 calyx-lobes linear-oblong, obtuse, becoming spatulate ; coro'la white (3" -4" broad). 

 — Woods, high mountains of Virginia, and southward. May. 



§ 3. EtJTOCA. (Eutoca, R. Br.) Seeds {or at least the ovules) several or many, 

 rarely only 3 or 4 on each placenta : corolla usually with small and inconspicuous 

 folds or appendages within, its lobes entire. {Ours are annuals or biennials.) 



4. P. parvifldra, Pursh. Somewhat hairy, slender, diffusely spreading 

 (3' -8' high) ; leaves pinnately cleft or the lower divided into 3-7 short lobes ; 

 racemes solitary, loosely b-\b-fbwered ; pedicels filiform, at length several times 



24 



