74 Britton : Cuban Plants New to Science 



and somewhat angled. Leaves chartaceous, distichous, oval to 

 elliptic, 4-8 cm. long, 2-4 cm. wide, rounded at the apex, obtuse 

 or narrowed at the base, pinnately veined ; stipules clustered at 

 the end of the stem, lanceolate, acuminate, striate, 1 1.5 cm. long; 

 flowers fascicled in the axils, reddish, the slender pedicels 3-6 

 mm. long; perianth-segments 4, those of pistillate flowers sub- 

 orbicular, rounded, about 4 mm. long, larger than the staminate ; 

 styles united ; stigmas 3, short, spreading ; filaments united ; an- 

 thers 2. 



Valleys, northern Oriente : type collected between Yamuri 

 Arriba and Bermejal (Shafer 8446). 



DIMORPHOCLADIUM Britton, gen. nov. 



A shrub, with dimorphous branches and leaves. Primary 

 branches stout, terete, their leaves oblong-spatulate, densely ar- 

 ranged spirally. Secondary branches very slender, compressed, 

 their small oblong-obovate leaves distichous. Staminate flowers 

 pedicelled, clustered in the axils ; sepals 5, ovate. Stamens 4, 

 the filaments connate, the anthers free, subquadrate. [Greek, 

 dimorphous branches.] A monotypic genus. 



Dimorphocladium formosum (Urban) Britton, comb. nov. 



Phyllanthus formosus Urban, Repertorium 13: 451. 1914. 



Thickets between Camp La Barga and Camp San Benito, 

 Oriente. Endemic. A shrub 4-6 dm. high, the flowers pink. 



Phyllanthus Selbyi Britton & Wilson, sp. nov. 



A glabrous, perennial herb, 4 dm. tall, with ascending, slightly 

 flexuose, woody branches; the slender leafy twigs 1.5-3 cm - 

 long. Leaves elliptic to oval, 2-2.5 mm. long, 1.3-1.6 mm. broad, 

 obtuse at the apex, rounded or somewhat truncate at the base, 

 short-petioled, coriaceous, veinless or nearly so; stipules linear- 

 lanceolate, 1 mm. long; flowers monoecious; pistillate flowers 

 short-pedicelled, the sepals obovate, 1.3-1.5 mm. long, 0.5 mm. 

 broad ; ovary depressed-globose ; styles 3, forked near the top ; 

 staminate flowers short-pedicelled, the sepals broadly ovate, 1.2 

 mm. long, 0.9-1 mm. broad ; filaments united with a short column ; 

 anthers 3; capsule depressed-globose, about 1.8 mm. broad; seeds 

 brown, about 1 mm. long, transversely striate. 



White sand, vicinity of San Pedro, Isle of Pines (Britton, 

 Wilson & Sclby 14157). 



