FABACEAE. 87 



1. S. tomentosa L. Shrub, with copiously pubescent foliage: blades of the 

 leaflets oblong, oblong-ovate, or oval, or rarely spatulate, 2.5-6 cm. long, 

 finely pubescent beneath: calyx 5-8 mm. long, the limb undulate: corolla yel- 

 low, 18-25 mm. long: blades of the wings and the keel-petal narrowly oblong: 

 pods 5-11 cm. long, torulose. — Coastal sand-dunes and shore hammocks. — F. K. 

 {Ber., Ball., Cuba, Ant.) 



2. CROTALARIA [Dill.] L. Herbs. Stipules often decurrent on the 

 stem or branches. Leaf-blades 3-foliolate or 1-foliolate. Calyx with a promi- 

 nently 2-lobed upper lijD and a deeply 3-lobed lower lip. Corolla yellow or 

 blue: standard with a pair of callosities near the base of the blade: wings 

 with the scarcely auricled blades broadened upward: blades of the keel-petals 

 broadly scythe-shaped. Pods globular to cylindric. — Eattle-box. 



A. Leaves with 1-folioIate blades. 



Leaflets with orljicular or oval liiades predominating : stems decuml^ent or 

 prostrate. 

 Stems and peduncles with relatively long, loose or spread- 

 ing hairs. 1- C rotundifolia. 

 Stems and peduncles with short appressed hairs. * -. C. maritima. 

 Leaflets with linear blades predominating : stems erect or 



nearly so. 3. C. Purshii. 



B. Leaves with 3-foliolate blades. 



Plants annual : lobes of the lower calyx-lip longer than the 



tube : pods li.5-3.5 cm. long. 4. C. incana. 



Plants perennial : lobes of the lower calyx-lip shorter than 



the tube : pods 1-1.5 cm. long. 5. C. pumila. 



1. C. rotundifolia (Walt.) Poir. Stems radiating from the stout root: blades 

 of the lower leaflets orbicular to obovate; of the upper ones oval, oval-ovate, 

 or broadly oblong: calyx loosely pubescent: standard 11-14 mm. long. — Pine- 

 lands. 



2. C. maritima Chapm. Similar to C. rotundifolia in habit: blades of the 

 lower leaflets suborbicular to oval; of the upper ones narrower: calyx appressed- 

 pubescent: corolla rather smaller than in C. rotundifolia. — Pinelauds. — F. K. 



3. C. Purshii DC. Plant 1-5 dm. tall, the branches sometimes decumbent: 

 blades of the lower leaflets spatulate to oblanceolate ; of the upper ones linear, 

 often very narrowly so: calyx becoming 11-14 mm. long: standard 8-10 mm. 

 long; keel 7-8 mm. long: ovary glabrous.— Pinelands. — F. K. 



4. C. incana L. Plants erect: blades of the leaflets oval to obovate: calyx 

 becoming 10-12 mm. long: keel 14-16 mm. long: ovary pubescent.^ — Pinelands 

 and waste places. Nat. of Trop. Am. — F. K. {Bah., Cuba, Ant.) 



5. C. pumila Ortega. Plants decumbent: blades of the leaflets cuneate to 

 oblong-cuneate: calyx becoming 4-5.5 mm. long: keel 8-10 mm. long: ovary 

 pubescent. — Hammocks and pinelands, and coastal sand-dunes. — F. K. {Bah., 

 Cuba, Ant.) 



3. INDIGOFEEA L. Herbs. Leaflets several, or rarely 3, pinnate, or 

 rarely solitary. Flowers in spikes or racemes. Calyx-lobes nearly equal, shorter 

 than the" tube, or elongate. Corolla often pink or purple: standard broad, 

 scarcely clawed: wings with blades dilated at the apex and auricled at the 

 base, short-clawed: keel-petals scimitar-shaped, gibbous or spurred on the side, 

 clawless. — Indigo-plant. 



Plant prostrate : calyx-lobes subulate or lanceolate-subulate, much longer than the 

 tube : standard 7-8 mm. long : androecium 5-6 mm. long : pods straight. 



1. /. miniata. 



Plant erect : calyx-lobes deltoid to triangular-lanceolate, as long 

 as the tube or shorter: standard 3-4.5 mm. long: androecium 

 2.5-3 mm. long : pods curved. 2. I. suifntticosa. 



