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37. RHYNCHOSIA Lour. 
Usually twining or trailing perennial herbs, with 1 to 3-pinnately fo- 
liolate leaves, yellow racemose or clustered flowers, a 4 or 5-parted 
calyx, scythe-shaped or incurved keel, and a short flat 1 or 2-seede.l 
pod. 
1. R. menispermoidea DC. Stem twining or prostrate, retrorsely pubescent : 
leaflet solitary, reniform, pubescent on both surfaces, 2.5 to 3.5 cm. in diameter: pe- 
duncles very short, 1 to 3-flowered : pod oval-lanceolate, acute, scarcely pubescent, 
1 or 2-seeded.— Low sandy ground, eastern Texas and extending to Corpus Christi, 
2. R. Texana Torr, & Gray. Minutely velvety pubescent: stems decumbent, 
scarcely twining, diffuse, much branched from the base: leaves 3-foliolate; leaflets 
rhombic-ovate or ovate-lanceolate, obtuse, rounded or slightly cordate at base, pu- 
bescent and dotted with minute glands beneath, the upper surface reticulated and 
nearly glabrous, about 12 mm. long: peduncles one to several-flowered, much shorter 
than the petioles: pod oblong, narrowed at base, pubescen t.—Throughout southern 
Texas, from the Gulf to New Mexico. Var. ANGUSTIFOLIA Gray has elongated and 
somewhat climbing branches, with lanceolate, linear-oblong, or even linear-lanceo- 
late leaflets. Prairies of western Texas. 
38. CERCIS L. (Rrp-sup. JUDAS-TREE, 
Small trees, with simple cordate to reniform entire palmately-veined 
leaves, red or purplish flowers on slender pedicels in axillary fascicles 
and appearing before the leaves, and an oblong flat and thin shortly- 
stipitate many-seeded pod. 
1. C. occidentalis Torr. A small tree or shrub, glabrous: leaves round-cordate, 
very obtuse and not at all produced above, sometimes emarginate, about 5 em. in 
diameter: petals 8 mm. long, rose-colored : pod about 5 em, long, 16 mm. broad, acute 
at each end, on a pedicel about 12 mm, long.—A far western and north Mexican spe- 
cies, extending into western Texas, 
2%. C. reniformis Eng. Resembling the last, but with the leaves somewhat pro- 
duced above (though still obtuse) and somewhat pubescent beneath (at least when 
young), and pedicels often shorter, (C. occidentalis, var. Texensis Watson. )—Western 
Texas. 
39. CASSIAL. (SENNA. ) 
Herbs or shrubs, with simply and abruptly pinnate leaves (not glan- 
dular-punctate), mostly yellow flowers (usually in terminal or axillary 
racemes or clusters), a 5-parted calyx, 5to 10 stamens with anthers de. 
hiscing at the apex, and a terete or flattened thick-coriaceous to mem- 
branaceous many-seeded usually curved pod. 
* The three upper anthers deformed and imperfect. 
1, C. pumilio Gray. Dwarf, subcaulescent from a woody caudex which scarcely 
rises out of the ground, strigalose: leaves crowded ; leaflets 1 pair, linear or lance- 
olate, cuspidate, as long as the petiole, with an interposed subulate gland, 2.5 em. 
or less long, 2 to 4 mm. wide ; petiole produced into a setaceous appendage ; stipules 
setaceous-subulate, persistent: peduneles 1-flowered, longer than the leaf: corolla 
16 mm. in diameter, pale yellow : pod inflated, ovoid or oblong, very obtuse, mem- 
branaceous, puberulent.—Throughout southern and western Texas. 
2. C. Roeemeriana Scheele. Stems 3 to 6 dm. high, herbaceous nearly or quite to 
the base, from a very thick ligneous root, cinereous-pubescent : leatlets 1 pair, lance- 
