634 FABACEAE 



2. Stylosanthes biflora ( L. ) B.S.P. Root stout, elongated. Stems several, loosely 

 tufted, erect or ascending, 2-5 dm. long, more or less flexuous, villous on one side below 

 the stipules, simple or branched above : stipules adnate to above the middle of the petiole, 

 their free tips subulate, sparingly ciliate : leaflets 3, the blades elliptic, linear-elliptic, 

 lanceolate or oblanceolate, 1-3.5 cm. long, mucronate or apiculate, entire, on short pubes- 

 cent petiolules, with prominent straight nerves and often whitened beneath : corolla orange ; 

 standard suborbicular, but longer than broad, 8 mm. broad, pale orange, notched at the 

 apex, short-clawed, the spurs curved ; wings obliquely obovate, 4-5 mm. long, pale-orange, 

 with short slender claws and acute auricles ; keel-petals sickle-like, greenish, as long as 

 the wings : pods 2-jointed, the terminal joint with an almost axile beak. 



In dry or sandy soil, New York to Kansas, south to Florida and Texas. Spring to fall. A campes- 

 trian form, with hirsute stems, is S. biflora hispidlssima (Michx.) Pollard & Ball. 



3. Stylosanthes riparia Kearney. Root woody, often 3 dm. long. Stems few or 

 several, 1-3.5 dm. long, decumbent, branched, with a line of pubescence below the stipules : 

 leaflets 3, the blades elliptic, oblanceolate or cuneate-obovate, 10-18 mm. long or some- 

 times shorter, usually rounded at the apex, sometimes truncate, retuse or cuspidate at the 

 apex, entire, pale beneath, glabrous except for some marginal h.airs, prominently nerved, 

 especially beneath : spikes terminating the stem and its branches, about 6-flowered : upper 

 and lower flowers usually abortive : corolla orange-yellow ; standard with a blade broader 

 than long, about 5 mm. broad, the basal spurs straight ; wings 3.5 mm. long, obovate ; keel- 

 petals about as long as the wings : pods 2-jointed, the lower joint small and infertile, the 

 terminal joint triangular, 3-3.5 mm. long, excluding the lateral hooked beak. 



In woods and on dry banks, Delaware to Kentucky and Florida. Summer and fall. 



38. CHAPMANIA T. & G. 



Perennial herbs, with upright stems, often branched at the base. Leaves alternate : 

 blades unequally pinnate, with subulate stipules : leaflets few. Flowers in terminal racemes 

 perfect, but sterile, arid imperfect and fertile. Calyx membranous : tube with a stipe-like 

 base : four upper lobes united, lower lobe distinct, narrow. Corolla yellow : standard with 

 a suborbicular blade : wings oblique, broadest above the middle : keel obtuse, incurved. 

 Stamens monadelphous. Anthers alike or nearly so, alternately attached at the base, and 

 versatile. Ovary sessile : style slender, elongated. Ovules numerous. Pod elongated, 

 nearly terete, the joints longitudinally striate, glandular-roughened. 



1. Chapmania Floridaua T. & G. Foliage hirsute. Stems more or less branched 

 at the base, the branches ascending, wand-like or branching, 2-11 dm. tall : leaves 1.5-4 

 cm. long, with short petioles : leaflets 5-7, the blades narrowly oblong, oblanceolate, 

 cuneate or obovate, 0.5-2 cm. long : racemes 5-15 cm. long : calyx campanulate, 7-10 mm. 

 high ; lobes ovate, shorter than the tube : corolla yellow : pods 1-2 cm. long, acute, hispid. 



In sandy pine lands, Florida. Spring and summer. 



39. MEIBOMIA Heister. 1 



Herbs, shrubs or vines, with glabrous or pubescent foliage. Leaves alternate : blades 

 pinnately 3-foliolate or rarely 1- or 5-foliolate; leaflets stipellate. Flowers perfect, in axillary 

 or terminal racemes or panicles, or sometimes in clusters. Calyx with bractlets at the base : 

 lobes unequal, the upper two more or less united, the 3 lower forming a larger lip than 

 the upper. Corolla of various colors : standard broad, sometimes narrowed into a claw : 

 wings oblique, more or less coherent with the obtuse straight or incurved keel-petals. 

 Stamens monadelphous or partly diadelphous. Anthers alike. Ovary sessile or stalked. 

 Style filiform, incurved or inflexed. Ovules 2-many. Loment usually exserted from the 

 calyx on the stipe or stipe-like base, the joints indehiscent, flat or inflated. [Desmodium 

 Desv.] TICK-TREFOIL. BEGGAR'S TICKS. 



A. Loments constricted into separate rhomboidal or half-rhomboidal joints. 

 Loments straight above, deeply constricted below, long-stalked. 



Peduncles arising from the base of the plant. 1. M. nudiflora, 



Peduncles terminating the stems. 



Leaves clustered at the base of the peduncle. 2. M. grandiflora. 



Leaves scattered along the stem. 3. M. paudflora. 



Loments constricted above and below : 

 a. Constrictions deeper below than above. 

 * Stems trailing or reclining. 



f Leaflets with suborbicular blades, or if narrower, the racemes axillary. 



Leaflets mostly less than 2.5cm. long, leathery, the blades glabrate. 4. M. arenicola. 

 Leaflets mostly over 2.5 cm. long, the blades membranous, pubes- 

 cent. 5. M. Michauxii. 



Contributed by Miss Anna Murray Vail. 



