Rhynchosia. LEGUMINOSiE. 283 



10. WISTARIA. Nutt. gen. 2. p. 115 ; DC. prodr. 2. p. 3S9. 



Thyrsanthus, Elliotl. 



Calyx campanulato, somewhat bilabiate ; upper lip of 2 short teeth ; lower 

 of 3 triangular-lanceolate teeth. Vexillum with 2 callosities decurrent along 

 the claw : keel and wings falcate. Legume nearly terete, torulose, stipitate 

 many-seeded. Seeds reniform. — Twining shrubby plants. Stipules minute. 

 Racemes large, axillary and terminal, with large colored deciduous bracts. 

 Flowers lilac-colored, beconaing resupinate by the twisting of the pedicels 

 after flowering. 



1. W. frufescena (DC.) : younger shoots pubescent, at length glabrous ; 

 wings with 2 auricles ; ovary glabrous ; leatlets ovate-lanceolate, acute. 

 — DC. prodr. 2. p. 390. W. speciosa, Nutt. I. c. Glycine frutescens, Linn. ; 

 Michr. ! ft. 2. p. 63 ; Sims. bat. mag. t. 2103. Apios frutescens, Pursh, 

 fl. 2. p. 474. Thyrsanthus frutescens, Ell. sk. 2. p. 237. 



0. macrostachxja: leaflets elliptical-lanceolate ; raceme very long and 

 flowers large; calyx lanuginous, glandular. — W. macrostachya, Null. mss. 



Damp rich alluvial soils, Virginia ! to Florida ! Illinois, Michaiuv ! p. Lou- 

 isiana, j\f. Teinturier fide Nuttall. April.-May. — Stem long, climbing 

 over bushes and small trees. Leaves 6-8 inches long ; leatlets 4-6 pairs, 1-2 

 inches long, slightly pubescent. Racemes oblong, 3-6 inches long (often 

 9 inches in 13.) and about two inches in diameter, before the expansion of 

 the flowers appearing like aments, from the conspicuous bracts. Pedicels 

 3-4 lines long. Calyx pubescent, often purplish ; upper lip very obtuse and 

 obscurely 2-toothcd : teeth of the lower lip much shorter than the tube. Vex- 

 illum nearly orbicular ; callosities broad and free at the apex. Wrings as 

 long as the keel ; the auricle on the upper side subulate, almost as long as the 

 claw ; inferior one very short. Keel-petals cohering at the summit, each 

 furnished with a long subulate tooth at the base of the limb. — A highly orna- 

 m«ntal plant, now common in gardens. 



Subtribe 2. Rhyncmcsie^e, Benth. — Ovary 1-2-ovuled. Inflorescence ax- 

 illary: flowers solitary or racemose, with the pedicels seldom aggregated. 

 Vexillum usually biappendiculate at the base. Upper portion of the style 

 usually indurated. 



IL RHYNCHOSIA.* {Lour.1) DC. (parfly); IF. ^ Am. prodr. Ind. 



Or. 1. p. 238. 



Arcyphyllum, £«.— Glycine, ^TuU. ; H. B. if- K. 



Calyx ebracteolate, somewhat bilabiate, with the lower lip 3-parted, and 

 the upper bifid and about equal to the lower ; or deeply and almost equally 

 4-parted (rarely 5-parted) nearly to the base, the upper segment 2-cleft. Co- 

 rolla deciduous : vexillum without callosities : keel falcate. Style glabrous. 



♦ From a remark in Mr. Bentliam's late memoir, De Les^uminosnrnm generihus, 

 p. 49, we perceive that E. Meyer considers the orif^inal Rhynchosia of Loureiro to 

 be different from the Rhvnchosia of De CandoUe ; and he has therefore applied the 

 name of Copisma to the latter. But if this view be correct, the name Arcyphyllum 

 of Elliott has the priority. 



