280 
3. P congesta Hook. Pubescent and commonly cinereous: leaves pinnately 3 to 
7-divided or parted, in the common form with comparatively few and broad lobes: 
stamens more or less exserted: sepals from linear to oblanceolate: pod ovoid.— 
Throughout Texas. Leaves very variable in the amount of dissection, passing from 
the common formas given above, through intermediate forms, to var. DISSECTA Gray, 
in which the leaves are more finely once or twice pinnately divided or parted into 
more numerous segments and lobes, with small interposed leaflets. —. 
** Ovules and seeds 2 to 8 on each placenta: corolla rotate or campanulate, with no ap- 
pendages. 
+ Ovules 2 to 4 on each placenta: slender and smoothish litile annuals. 
4, P. glabra Nutt. Glabrous except a few hirsute short hairs chietly on the mar- 
gins of the leaves and calyx: corolla6 to 8mm. broad: calyx-lobes in fruit little longer 
than pod: otherwise as in the next.—Low prairies, Arkansas and eastern Texas, 
5. P. parviflora Pursh. Sparsely hirsute or glabrate: radical and lowest cauline 
leaves lyrately pinnate, with 3 to 5 roundish leaflets or divisions, or sometimes simple 
and entire; upper mostly sessile and 3 to 9-parted or cleft into oblong or linear- 
lanceolate lobes: raceme loose: corolla 8 to 12 mm, broad: calyx-lobes in fruit nearly 
twice the length of the pod.—Shaded places, extending from the Atlantic region to 
Texas, and passing into var. HIRSUTA Gray, which is more hirsute, and with larger 
corolla (10 to 14mm. broad). 
++ Ovules about 8 on each placenta: stouter plants, with less divided leaves. 
6. P. patuliflora Gray. Rather softly cinereous-hirsute or pubescent, and inflores- 
cence somewhat glandular, erect or diffuse: leaves obovate or oblong; lowest lyrate- 
pinnatitid; upper commonly only pinnatifid-incised, sessile: racemes lax, at length 
elongated: pedicels spreading or nodding (especially in fruit), 8 to 14 mm. or more 
long: corolla deep blue with yellow base, the lobes somewhat crose: pod thin-walled. 
(Eutoca patulifora Eng. & Gray.)—Low prairies and thickets, along and near the 
coast. 
7. P. strictiflora Gray. Shorter and stouter, more cinereous-hirsute: leaves rather 
more pinnatifid: racemes in fruit strict and mostly dense, with pedicels erect and not 
longer than the pod ¢61m.): pod firm-coriaceous. (Hutoca strictiflora Eng, & Gray.)— 
Sandhills of eastern and central Texas. 
* * * Ovules and seeds 10 to 12 on each placenta: corolla almost rotate, with 10 transverse 
appendages in the throat remote from the stamens: seeds strongly corrugated trans- 
versely, 
8. P. micrantha Torr. Slender low annual, minutely hirsute-glandular: leaves 
pinnately parted into 5 to 9 obovate or oblong very obtuse and mostly entire lobes; 
lower with margined petiole, upper with dilated and sometimes auriculate partly clasp- 
ing base: racemes geminate or panicled, very loose: corolla bright blue with yellow- 
ish tube, little exceeding the enlarging calyx-lobes, barely 4mm. broad when ex- 
panded.—Along the Rio Grande near E] Paso and westward. 
3. NAMA L. 
Chiefly low herbs (some few woody-based), with funnelform or some- 
what salverform corolla (purple, bluish, or white), filiform filaments and 
(2 mostly distinct) styles (former commonly unequal and often unequally 
inserted), and membranaceous loculicidal pod with seeds borne on the 
valves. 
* Low annuals; flowers terminal or lateral, or in the forks of the stem 
+ Leaves decurrent on the stem, 
1, N. Samaicense L. Diffusely spreading or prostrate, soft-pubescent: leaves 
broadly obovate or spatulate, tapering into a petiole-like base which is continued 
