1 1 EUPHORBIACEAE. 



13. C. pergemena Small. Brauclies glabrous: leaf -blades oblong or ovate: 

 involucres about 1.5 mm. long, minutely pubescent: gland-appendages white or 

 pink, conspicuous, larger than the glands, 1 or 2 of them much larger than the 

 others: capsules about 1.5 mm. broad, pubescent: seeds less than 1 mm. long. — 

 Pinelands. 



14. C. conferta Small. Branches villous: leaf -blades oblong to ovate: invo- 

 lucres 1.5-2 mm. long, villous: gland-appendages red or magenta, 2 of them 

 petal-like, much larger than the others, toothed: capsules less than 1.5 mm. 

 broad, minutely pubescent: seeds less than 1 mm. long. — Pinelands. 



15. C. adenoptera (Bertol.) Small. Branches closely villous: leaf-blades oblong 

 or ovate-oblong: involucres 1-1.5 mm. long, finely pubescent: gland-appendages 

 white or pink, petaloid, 2 of them much larger than the glands: capsules about 

 1.0 mm. broad, densely pubescent: seeds about 1 mm. long. — Pinelands. — F. K. 



16. C. hirta (L.) Millsp. Branches closely pubescent: leaf -blades oblong to 

 oblong-lanceolate, or somewhat triangular, often prominently blotched: invo- 

 lucres mostly in axillary clusters, 1 mm. long or less, minutely pubescent: 

 gland-appendages obsolete or nearly so: capsules fully 1 mm. broad, finely 

 pubescent: seeds about 1 mm. long. [C. pilulifera (L.) Small.]- — Hammocks. 

 —F. K. (Ber., Bah., Cuba, Ant.) 



17. C. gemella (Lag.) Small. Similar to C. hirta but smaller, and with more 

 closely prostrate branches: leaf -blades oblong to oblong-lanceolate, mostly 

 evenly green: involucres mostly in terminal clusters, about 1 mm. long, finely 

 pubescent: gland-appendages white, narrower than the glands: capsules fully 

 1 mm. broad, often closely pubescent: seeds less than 1 mm. long. [C. pilu- 

 lifera procumbens (Boiss.) Small.] — Hammocks. — F. K. {Ber., Bah., Cuba, 

 Ant.) 



18. TITHYMAIiOPSIS Kl. & Garcke. Perennial herbs, often topped by 

 an imibel. Leaf-blades entire. Involucres scattered or somewhat clustered, 

 each with appendaged glands. Capsule smooth. Seeds punctate. — Spurge. 



1, T. polyphylla (Engelm.) Small. Plants 0.5-2.5 dm. tall, the stems stout, 

 often tufted, copiously leafy: leaf -blades linear or linear-spatulate, 5-15 mm. 

 long: involucres 1.5-2 mm. long; gland-appendages white or pinkish, mostly 

 reniform, crenate: capsules 4-5 mm. broad: seeds about 2.5 mm. long, white. — 

 Pinelands. 



19. TITHYMALUS Adans. Annual or perennial herbs or partially 

 woody plants, topped by an umbel. Leaf-blades entire or finely toothed. 

 Involucres in open or compact cymes, each w-ith 4 naked or merely horned 

 glands. Capsule smooth or tuberculate. Seeds pitted. — Spurge. 



1. T. trichotomus (H. B. K.) Kl. & Garcke. Stems 1-4 dm. tall: leaf-blades 

 cuneate to oblong, 0.5-1.2 cm. long: bracts similar to the leaves: involucres 2 

 mm. long; glands obreniform: capsules about 4 mm. broad, minutely wrinkled: 

 seeds subglobose, fully 1.5 mm. in diameter. — Coastal sand-dunes. — F. K. 

 {Bah., Cuba, Ant.) 



20. POINSETTIA Graham. Annual, biennial, or perennial herbs or 

 woody plants. Leaf-blades entire, toothed, or lobed, those of the upper ones 

 often like the bracts highly colored or discolored. Involucres solitary or 

 cymose, each with 1, or rarely 3 or 4, unappendaged glands. Capsule smooth. 

 Seeds tuberculate. — Spurge. 



Leaves, at least tbose of the main stem, and the bracts, with hroad, toothed, pnn- 

 durate or pinnately lobpd hiadps, those of the branches often narrow: plants 

 pubescent : Invohieral glands mostly solitary. 



