HYDKOPHYLLACE^E. (\VATERLEAF FAMILY.) 255 



rhomboid -ovate, acuminate or acute, coarsely incised-toothed ; the lowest 

 commonly 2-cleft and the terminal one often 3-lobed : peduncle usually once 

 or twice forked : cyme at length open : calyx 5-parted to the very base into 

 narrow linear and spreading hispid-ciliate divisions : corolla nearly white or 

 sometimes deep violet, about | inch long. Across the continent. 



2. ELLISIA, L. 



Plants with tender somewhat hirsute herbage : peduncles solitary or race- 

 mose : corolla whitish, mostly small in comparison with the stellate calyx. 

 In ours the leaves are once pinnately parted, and the upper mostly alternate. 



1. E. Nyctelea, L. A span to a foot high, at length very diffuse: 

 leaves on naked or barely margined petioles; the divisions 7 to 13, lanceolate, 

 acute, mostly 1 to 3-toothed or lobed : peduncles solitary in the forks or oppo- 

 site the leaves, or some of the later ones racemose and secund : calyx-lobes 

 acuminate, longer than the capsule : corolla rather shorter than the calyx. 

 Upper Arkansas, Colorado, to the Saskatchewan, and eastward across the 

 continent. 



3. PHACELIA, Juss. 



Corolla blue, purple, or white, never yellow, except the tube of certain 

 species ; the tube with or without internal folds : calyx-lobes more or less 

 enlarging in fruit : seed-coat reticulated or pitted. 



1. A pair of ovules to each placenta: seeds as man// or by abortion fewer : 

 lobes of the campanulate corolla entire (or rareltf erose-dentate) ; the tube with 

 10 laminate appendages in pairs at the base of the stamens. EUPHACELIA. 

 * Leaves all simple and entire, or some of the lower pinnately 3 to 5-parted or 

 divided: capsule ovate, acute: seeds densely alveolate-punctate. 



1. P. circinata, Jacq. f. Hispid and the foliage strigose, and either 

 green or canescent, a span to 2 feet high : leaves from lanceolate to ovate, 

 acute ; the lower tapering into a petiole and commonly some of them with 

 one or two pairs of smaller lateral leaflets : inflorescence hispid ; the dense 

 spikes thyrsoid-congested : corolla whitish or bluish : filaments much ex- 

 serted, sparingly bearded. On dry ground, from New Mexico and Cali- 

 fornia to Dakota and British Columbia. 



* * Leaves pinnately toothed, lobed, or compound, and the lobes or divisions 

 toothed or incised : capsule globular or ovoid, obtuse : seeds with excavated 

 ventral face divided by a salient ridge. 



- Calyx, etc. not setose-hispid. 



2. P. integrifolia, Torr. A span to 2 feet high, strict, viscid-pubescent 

 or hirsute, very leafy : leaves ovate-oblong or lanceolate, sessile or the lower 

 short-petioled with a commonly subcordate base, simply or mostly doubly cre- 

 nate-toothed, sometimes incised : spikes crowded, at first thyrsoid : corolla whitish 

 or bluish : stamens and style long exserted. Ann. Lye. N. Y. ii. 222. Dry 

 soil, Colorado to Texas, Arizona, and Utah. 



