104 EUPHORBIACEAE. 



Stamens 10 or fewer: petals present. 15. JATROPHA. 



Flowers In simple or branched racemes. 10. MANIHOT. 



Flowers In Involucres : calyx represented by a scale. 



Involucre regular or nearly so, nearly or quite equilateral. 

 Glands of the Involucres with petal-like appendage*, 



these sometimes much reduced. 



Leaves all opposite. 17. CHAMABSYCB. 



Leaves alternate or scattered at least below the 



Inflorescence. 18. TITHYMALOPSIS. 



Glands of the Involucres without petal-like appendages, 

 entirely naked, sometimes with crescent-like horns. 

 Stem topped by an umbel : stipules none : Involucres 

 in open cymes, each with 4 glands and entire or 

 toothed lobes. 10. TITIIY MALI'S. 



Stem not topped by an umbel : stipules gland-like : 

 Involucres In cluster-like cymes, each with a 

 single gland or rarely 4 glands and fimbrlate lobes. 20. POIXSETTIA. 

 Involucre Irregular, very oblique. 21. PXDILANTHI s. 



1. PHYLLANTHUS L. Herbs or partially woody plants. Leaf-blades 

 entire. Flowers apetalous. Staminate flowers with 5 or 6 sepals and usually 3 

 stamens. Pistillate flowers with 5 or 6 sepals and a 3-celled ovary. Fruit 

 rapsular. 



Plants annual : mature pistillate calyx 2.5 mm. wide. 



Leaf-blades cuneate to obovate : capsules about 1.5 mm. wide. 1. P. taricola. 

 Leaf-blades oblong or nearly so : capsules about 2 mm. wide. '2. P. \inn-i. 

 Plants perennial : mature pistillate calyx 3 mm. wide. 



Leaf-blades oblong or nearly so : stamlnate calyx 2 mm. wide ; 



sepals ovate to orbicular-ovate. 3. P. Garbcri. 



Leaf-blades cuneate: stamlnate calyx 1.5 mm. wide; sepals 



suborblcular. 4. P. pcntophyUus. 



1. P. saxicola Small. Plants 0.5-3.5 dm. tall: leaf-bladw cuneate to obovate, 

 abruptly narrowed at the base: staminate calyx 1.5 mm. wide; sepals Mil .or 

 bicular: mature pistillate calyx 2.5 mm. wide; sepals ovate to oblong-ovate: 

 capsules about 1.5 mm. wide. Everglades and wet hammocks. F. K. (Bah.) 



2. P. Niruri L. Plants 1-3 dm. tall: leaf -blades thin, oblong or nearly so: 

 staminate calyx 1.5 mm. wide; sepals orbicular-ovate: mature pistillate calyx 

 2.5 mm. wide; sepals oblong: capsules about 2 mm. wide. I'im-laii.ls ami waste 

 places. F. K. (Ber., Bah., Cuba, Ant.) 



3. P. Oarberi Small. Plants 1-3 dm. tall: leaf -blades thi.-kish oblong or 

 nearly so: staminate calyx 2 mm. wide; sepals ovate to orbicular-ovate: 

 mature pistillate calyx 3 mm. wide; sepals oblong to ovate: -:i|.~:;l.-- L'..", :; mm. 

 wide. Coastal sand-dunes. F. K. 



4. P. pentaphyllus Wright. Plants 0.5-3.5 dm. tall: leaf-blades thiimish. 

 mainly short-cuneate: staminate calyx 1.5 mm. wide; sepals suborbicular : 

 mature pistillate calyx 3 mm. wide; sepals obovate to rllipti. : <;i|>-ule8 less 

 than 1.5 mm. wide. [P. radicans (Muell. Arg.) Small.] Pinelands. F. K. 

 (Cuba.) 



2. CICCA L. Shrubs or trees. Leaf-bla.l.-s ,-ntir.-. Flowers similar to 

 there of Ph\illanthun, but with vertically opening anther-sacs. Fruit l-:i 



1. 0. distich* L. Shrub or small tree, the branchlets spreading or drooping, 

 glabrous: leaven various, those near the bare of the l>rnnrlilrt \\ith Mil.orhi.ti 

 lar to orbicular-ovate blades 1.5-3 cm. long, thoce above them with larger 

 ovate to oblong-lani-eolatc blades; larger wpul* -ul.nrl.i.-nlar to orbicular- 

 obovate, 1.5-2 mm. long: berries deprewe.l. 1.:. J , in. l.roa.l.- I'in.-lands and 

 waste places. F. K. Nat. of the I-:. In )>. -. and cultivated. (Bah., Cuba, 

 A nt. ) OTAHEITE-GOOSEBERRT. 



3. BREYNIA Forst Shrubs or trees. Leaf -blade* broad, entire. FI.MV.TS 

 solitary in the leaf-axils, or the staminate few together. Staminate flowers 



