PERKINS THE LEGTJMINOSAE OF POETO RICO. 183 



Trinidad (Grisebach). Found in many parts of tropical America, also introduced in 



the Old World. Frequent a- a weed on cultivated land. 



. The large spurred stipules of A. arm ricana are used as a dwelling place by ants. By 

 the form of the stipules it can easily l>e distinguished from A. sensitiva. The half-round 

 joints of the pod, rectilinear on the superior, rounded on the inferior margin, are also 

 striking. 



Loral name, yerba rosario. 



3. Aeschynomene americana villosa (Poir.) Urb. 



(Urban, 2SS.) 

 Flowers orange-colored. 



Near Aibonito, at Algarrobo; near Cayey at 330 meters altitude; near Guaniea. on 



gravelly banks at Barina; near Maricao in pastures; near Mayaguez around the fortress; 



near Rincon, in rocky places at Barrio del Pueblo; near Aguada, on plains at Piedra 



Blanca. Cuba, Martinique. 



4. Aeschynomene portoricensis Urb. 

 (Urban, 288.) 



Perennial or undershrub; stipules ovate or lanceolate, 1.5 to 2.5 mm. long; leaflets 

 obovate or oval, rounded at the top, subcordate at the base, 5 to 8 mm. long; inflo- 

 rescence 10 to 15 mm. long, axillary, simple, 1 or 2-flowered; flowers yellow, 5 mm. 

 long; pedicel 3 to 5 mm. long; calyx 2.5 mm. long; petals subequal; pod 4 to 5 mm. 

 long, stipitate, the articulations 2 to 4; seeds subtriangular-ovate, olive-green, smooth, 

 shiny. 



Near Maricao; near Manati. in the sand on the shore of Lake Tortuguero. 

 Indigenous. 



This is the only one of the Porto Rico Aeschynomenes that has 4 or 5-jugate leaflets. 



40. STYLOSANTHES Sw. 



Stylosanthes Sw. Prod. Veg. Ind. Occ. 108. 1788. 



Calyx with an elongated filiform tube and scarious lobes, the four upper ones 

 connate, the lowest distinct, elongate; petals and stamens inserted at the throat of 

 the tube; standard orbicular or suborbicular, emarginate; wings oblong, free; keel 

 incurved, subrostrate; stamens all connate, in a closed tube, the anthers alternately 

 longer and fixed near the base and shorter and versatile; ovary nearly sessile at the 

 base of the tube, 2 or 3-ovulate; style long, filiform, after flowering broken at the 

 middle or near the base, the portion that remains becoming decurved: stigma 

 minute and terminal; pod subsessile, compressed, crowned with the persistent 

 curved base of the style, the articulations usually two, sometimes solitary, rugose- 

 reticulated. Pilose, often hirsute-setose, sometimes viscous herbs or undershrubs; 

 leaves pinnate; leaflets 3, lanceolate to linear: stipules adnate to the petiole except 

 the long, free, subulate apices; flowers yellow, axillary or terminal, in dense spikes 

 or heads. 



1. Stylosanthes hamata (L.) Taub. a 



(Urban, 288.) 



Stems procumbent or diffuse, from a few centimeters to I meter high; leaflets 

 oblong or oblong-lanceolate. 7 to 17 mm. long, 2 to (i mm. wide, pointed, glabrescent : 

 flowers yellow, in bracteate spikes l"> mm. long, single or with an accessory striate 



"Cook and Collins, p. 245, as Stylosanthes procumbens. 



