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* Ovary and pod 1-celled: style 2-cleft: leaves cut-toothed, lobed or pinnate. 
1. Nemophila. Calyx with appendages at the sinuses: ovary lined with the di- 
lated and fleshy placentie. 
2. Phacelia. Calyx destitute of appendages: ovary with narrow parietal pla- 
cent, 
* * Ovary and pod 2-celled: styles 2: leaves entire, 
3. Nama. Corolla funnelform or salverform: pod loculicidal, the valves seed- 
bearing. 
4. Hydrolea. Corolla between rotate and bell-shaped: pod septicidal or bursting 
irregularly, leaving placentw in the axis, 
1. NEMOPHILA Nutt. 
Diffuse and fragile annuals, with opposite or partly alternate pin- 
natifid or lobed leaves, 1-flowered peduncles (flowers white, blue, or 
marked with purple), 5-parted more or less accrescent calyx with a re- 
flexed appendage in each sinus, bell-shaped to rotate corolla with tube 
mostly with 10 small folds or scales inside, included stamens, and spheri- 
cal pod ripening 1 to 4 seeds, 
1, N. microcalyx Fisch. & Meyer. Small, roughish-pubescent: stems diffusely 
spreading, 5 to 20 cm. long: leaves parted or deeply cleft into 3 to 5 roundish or 
wedge-obovate sparingly cut-lobed divisions, the upper leaves all alternate: pedun- 
cles opposite the leaves, shorter than the long petioles: flowers minute: corolla 
white, longer than the calyx, with no internal scales: placentw each 2-ovuled: pod 
1 or 2-seeded.—Moist woods, extending from the Southern States into Texas. 
2. N. phacelioides Nutt. Sparsely hirsute, 3 to 6 dm. high: leaves (all but the 
earliest) alternate, with naked petioles, 5 to 9-parted; divisions oblong or oval, the 
larger ones 2 to 5-lobed: peduncles rarely exceeding the leaves: corolla large, blue, the 
internal appendages hairy outside: placentw and pod as in the preceding.—Low 
grounds, from Arkansas to southern and western Texas, 
2. PHACELIA Juss. 
Perennial or mostly annual herbs, with simple lobed or divided leaves, 
often handsome (blue, purple, or white) flowers in scorpioid raceme-like 
cymes, 5-parted calyx with naked sinuses, open-bell-shaped 5-lobed 
corolla, slender often exserted filaments, and ovary with 2 narrow 
linear parietal placentie usually projecting inward in fruit and forming 
an imperfect partition in the ovoid 4 to many-seeded pod. 
* Seeds and ovules 2 on each placenta: corolla campanulate, with narrow folds or append- 
ages within, the lobes entire. 
+ Leaves all undivided, at most crenate-pinnatifid. 
1. P. integrifolia Torr. Strict, viscid-pubescent or hirsute, very leafy: leaves 
ovate-oblong or lanceolate, sessile or the lower short-petioled: spikes crowded, at 
first thyrsoid: stamens and style long-exserted: pod short-oveid.— Western Texas, 
+ + Leaves mostly once or twice-pinnately parted or divided. 
2. P. Popei Torr. & Gray. Pubescent, but not glandular or viscid, erect and 
strict, very leafy: leaves interruptedly twice pinnately parted into.small and short 
lobes: corolla-lobes entire, little surpassed by the stamens: sepals spatulate: pod 
globose.—High plains of western Texas. Wrongly referred to P. glandulosa in 
Synopt. Fl. ed. 1; and often confounded with P. Neo-Mexicana. 
