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ample border convolute in bud, 4 stamens with the cells of the some- 
what arrow-shaped anthers parallel and nearly equal, and narrow pod 
contracted and seedless at base (8 to 12-seeded). 
* Flowers in open pedunculate cymes from upper axils and forming a terminal panicle: 
bracts and bractlets small, linear or subulate: pod 8 to 12-seeded. 
1. R. tuberosa L. Glabrescent or minutely pubescent, 3 to 6 dm. high, with some- 
what tuberous-thickened roots: leaves (5 to 7.5 cm. long) with undulate or obscurely 
repand-dentate margins, ovate-oblong or elliptical, and with base cuneate-contracted 
or decurrent into a rather long petiole: calyx-lobes subulate-filiform, hardly equal- 
ing the slender tube of the (3.5 cm. long blue or white) corolla.—River bottoms, 
southern and western Texas; where is also found var, OCCIDENTALIS Gray, which is 
rather large and tall, with inflorescence and calyx viscid-pubescent, and leaves from 
glabrate to velvety-pubescent, mostly ovate and with more abrupt or even subcor- 
date base, sometimes 15 to 18 cm. long. 
** Flowers subsessile and commonly glomerate in the axils, when short-peduncled with 
foliaceous primary bracts or bractlets: pod at most 8-seeded. 
+ Suffrutescent: leaves rigid: corolla white. 
2. R. Parryi Gray. Much branched from the woody base: leaves obovate-oblong, 
tapering into a distinct petiole, hispid-ciliate, 2.5 cm.or less long: flowers mostly 
solitary in the axils: tube of corolla 2.5 cm. long, slender. (Dipteracanthus suffru- 
ticosus Torr. Mex. Bound).—Southwestern borders of Texas. 
+ + Herbaceous: stems mostly simple: corolla usually blue or violet. 
++ Calyx-lobes filiform-attenuate, longer than the pod. 
3. R.ciliosa Pursh. Usually hirsute with long spreading hairs, especially the 
calyx-lobes: leaves oblong, almost sessile: tube of blue corolla twice the length of 
calyx and of limb, the whole not rarely 5 cm. long.—A species of the Atlantic and 
Gulf States, represented in Texas by var. HUMILIS Britt. (2. ciliosa, var. longiflora 
Gray), in which the pubescence is sometimes cinereous, with or without long hirsute 
hairs, stems sometimes flowering when 5 to 7.5 cm. high, sometimes tall and slender, 
and leaves narrowly oblong, usually small. 
4. R. Drummondiana Gray. Cinereous-puberulent, tall: leaves ovate, 7.5 to 15 
em. long, petioled: canescent calyx-lobes (commonly 2.5 cm. or more long) more or 
less shorter than the tube of the (3.5cm. long) corolla.—Eastern and southern Texas. 
++ ++ Calyx-lobes lanceolate or linear, hardly surpassing the pod. 
5. R. strepens L. Green and almost glabrous or pubescent, 3 to 12 dm. high: 
leaves oblong-ovate or oblong, 5 to 20 em. long, mostly contracted at base into a 
short petiole: calyx sparingly soft-hirsute or ciliate: well-developed corolla 3.5 to 
5 cm. long.—Dry soil, extending from the Atlantic region into Texas. Along with 
the ordinary form occurs var. CLEISTANTHA Gray, with leaves commonly narrower 
and oblong, and flowers for most of the season cleistogamous. (Dipteracanthus 
micranthus Eng. & Gray in Pl. Lindh.) 
5. STENANDRIUM Nees. 
Low and small perennials, commonly with leaves all at base of scapi- 
form flowering stems, rose-colored or purple spicate flowers, 5-parted 
calyx with narrow nearly equal divisions, lobes of salverform corolla all 
equally spreading, 4 stamens in the throat of the corolla with short fil- 
aments and 1-celled muticous anthers, and 2 ovules in each cell. 
1. S. dulce Nees. Hirsute-pubescent or glabrate: leaves all radical, oval or oblong, 
18 to 32 mm. long, either narrowed or abruptly contracted into a rather long naked 
