74 BriTTonN: 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, I-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-I 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 & Selby 14157). ; 
