634 FABACEAE 



2. Stylosanthes biflora ( L. ) B.S.P. Boot 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 hispidlstima (Michx.) Pollard & Ball. 



3. Stylosanthes riparia Kearney. Koot 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 hairs, 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 Floridana 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. f/mndiflora. 



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



Loments constricted above and below : 

 a. Constrictions deeper below than above. 

 * Stems trailing or reclining. 



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



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

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

 cent. 5. M. Micfiauxii. 



1 Contributed by Miss Anna Murray Vail. 



