FABACEAE 643 



longer than the pod : corolla yellowish or yellowish white, 5-7 mm. long : pods ovate- 

 orbicular, 4-4.5 mm. long. 



In dry, usually sandy soil, Massachusetts to Michigan, Florida and Louisiana. Summer and fall. 



41. PITCHERIA Nutt. 1 



Perennial branching herbs, with erect stems. Leaves 3-foliolate, subsessile or very short- 

 petioled : leaflets resinous-dotted. Flowers short -pedicelled, solitary, or 2-3 in the axils 

 of the upper leaf -like bracts. Calyx very slightly bilabiate : lobes 4, about equal, the lower 

 lobe the longest ; upper lip 2-toothed. Corolla yellow, soon deciduous : standard gla- 

 brous ; blade obovate to nearly orbicular, without callosities, the margins of the short 

 claw folded in : wings smaller than the keel-petals, narrowly oblong, somewhat falcate, with 

 a subulate tooth at the base : keel rounded, somewhat falcate, shorter than the standard. 

 Stamens diadelphous : free filament articulated at the base, the lateral filaments sometimes 

 free to above or near the middle of the tube. Ovary hairy, 2-ovuled. Style filiform, 

 bearded below. Stigma subcapitate. Pod oblong, tapering at the base, sessile, compressed, 

 1-2-seeded. 



1. Pitcheria galactioides Nutt. Stems woody at the base, 6-10 dm. high, rigid, 

 widely and mostly symmetrically branched, pubescent : leaves numerous, 1-2.5 cm. long ; 

 leaflets 5-20 mm. long, the blades oval or obovate-oval, obtuse, reticulated and minutely 

 resinous-dotted and sparingly pubescent, especially on the midvein and margins beneath, 

 the terminal leaflet longer than the lateral sessile or very short-petioluled ones : flowers 

 about 1 cm. long : calyx 5 mm. long, minutely pubescent ; lobes lanceolate, long-acuminate : 

 corolla mainly yellow ; the petals sometimes" partially reddish or purplish-veined ; stand- 

 ard short-unguiculate, the blade oval, apiculate, the short spurs very acute : pods 1.5-2 

 cm. long, 7-8 mm. wide, tapering to the base, minutely pubescent, obscurely resinous- 

 dotted, and with few scattered longer hairs. 



In sandy pine lands, Florida and Alabama. Spring and summer. 



42. DOLICHOLUS Medic. 1 



Perennial, twining, trailing or erect herbs or shrubs, with short or elongated stems. 

 Leaves with 1-foliolate or pinnately 3-foliolate blades : stipules commonly persisting. Leaf- 

 lets punctate with resinous dots, usually leathery and prominently veined. Flowers perfect 

 in axillary or terminal racemes, or in axillary clusters. Calyx somewhat 2-lipped : lobes 5, 

 the upper lobes usually more united than the 3 lower. Corolla yellow : standard broad, 

 spreading or reflexed, mostly auricled at the base : wings narrow : keel-petals incurved at 

 the apex. Stamens diadelphous. Anthers all alike. Ovary sessile. Style stoutish, in- 

 curved at the apex. Ovules 1 or 2. Pod flattened, orbicular to oblong, 2-valved. Seeds 

 1 or 2 in a pod. [Rhynchosia Lour.] 



Corolla much longer than the calyx. 



Racemes very slender, many-flowered, exceeding the leaves : flowers and legumes reflexed. 



1. D. minimus. 



Racemes 1-6-flowered, as long as or shorter than the leaves. 

 Leaflets with leathery obtuse or merely acute blades. 



Blades of the leaflets velvety above, tomentulose and veiny beneath. 2. D. parvifolius. 



Blades of the leaflets strigillose above, puberulent or minutely strigil- 



lose beneath. 3. D. Texensis. 



Leaflets with membranous acuminate blades. 4. D. Swartzii. 



Corolla about as long as the calyx or much shorter. 

 Prostrate or climbing perennial vines. 



Leaves unifoliolate, or in D. Michauxii rarely the uppermost trifoliolate : 



racemes axillary. 



Leaflets with reniform blades, cordate at the base. 5. D. Americanus. 



Leaflets with reniform blades, truncate at the base. 6. D. Michauxii. 



Leaves trifoliolate. 



Racemes very short-peduncled or sessile. 



Stems prostrate, leaflets cinereous. 7. D. dnereus. 



Stems generally climbing. 8. D. tomentosus. 



Racemes peduncled or the uppermost short-peduncled, elongating. 



Prostrate : leaflets apiculate, 2.5-3.5 cm. long. 9. D. Torreyi. 



Climbing vines. 



Leaflets with obovate-orbicular, thin, blades rounded at the broad 



apex, narrowed at the subcordate base. 10. D. Lewtonii. 



Leaflets with ovate or ovate-rhombic, thick, velvety-pubescent 



blades : racemes commonly much elongated. 11. D. latifolius. 



Erect perennial herbs. 



Leaves unifoliolate, the leaflets with reniform blades. 12. D. eimplicifolius. 



Leaves trifoliolate or some of the basal ones unifoliolate. 



1 Contributed by Miss Anna Murray Vail. 



