418 RHAMNACE^. Coluhrinh. 



10. COLiUBRINA, Rich. (Name from Latiu Cohiber, a serpent, the ap- 

 plicatiou uucertaiu.) — Shrubs or trees with often rigidly divaricate but scarcely 

 spiny twigs, alternate entire or denticulate pinnately veined or 3-nerved small to 

 ample leaves (frequently glanduliferous beneath and with mostly small stipules), 

 and tomentose inconspicuous flowers in sessile or pedunculate axillary umbels. — 

 Rich, in Brongn. Mem. Rhamn. 61, «& Ann. Sci. Nat. x. 368 ; Benth. & Hook. 

 Gen. i. 379 ; Grisebach, Fl. W. Ind. 100; Baill. Hist. PI. vi. 77 ; Trelease, Trans. 

 St. Louis Acad. v. 361, 368; Sargent, Silv. ii. 47; Weberbauer in Engl. &. 

 Prantl, Nat. Pflanzenf. iii. Ab. 5, 415. — Warmer American region; one species 

 tropical in the Old World. 



* Leaves medium-sized or usually rather small, some of them deuticulate : common peduncle 

 very short or wanting: calyx-segments tardily and incouipletely deciduous: fruit short- 

 beaked by the persistent style. 



C. Texensis, Gray. Large shrub : brandies mostly rigidly divaricate, zigzag, terete, gray- 

 tumentose or glabresceut and whitened: leaves elliptical to spatulate-obovate, cuneate to 

 rounded at base, obtuse, acute or mucrouate, often 3-nerved, glabresceut, scarcely an inch 

 long ; their petioles about 2 lines long : fruit 4 lines in diameter, often solitary, on mostly 

 reflexed pedicels of about the same length. —PI. Lindh. pt. 2, 169, & PI. Wright, i. 33 ; 

 Torr. Pot. Mex. Bound. 47 ; Trelease, 1. c. 368. Rhamnus ? Texensis, Torr. & Gray, Fl. i. 

 263. R. Drummondii, Young, Fl. Tex. 204. — Central Texas and southward. (Mex.) 



* * Leaves ample, entire, elliptical to ovate-lanceolate : common peduncle evident : calyx- 

 segments soon falling : styles deciduous at base. 



C. ferruginosa, Brongn. Scarcely arborescent, at first densely red-tomentose : twigs lax, 

 nearly terete, gray to reddish brown : leaves firm, more or less 3-nerved near the margin, 

 somewhat glossy above, 1 or 2 to at length 4 or 5 inches long : the lower surface more per- 

 sistently red-hairy and with a submarginal series of smooth glands, and frequently several 

 additional glandular spots: cymes densely red-tomentose even in fruit: capsules 2 to 4 

 lines in diameter, little grooved, more clustered than in our other species ; pedicels ratlier 

 stout, the longer becoming 4 or 5 lines in length. — Mem. Khamn. 62, t. 4, f. 3, & Ann. 

 Sci. Nat. X. 369 ; Griseb. Fl. W. Ind. 100; Trelease, 1. c. 369. C./enwfr/mea, Brongn. Mem. 

 Rhamn. 77, & Ann. Sc. Nat. x. 384 (by error). C. Americana, Nutt. Sylv. ii. 47, t. 58 ; 

 Chapm. Fl. 74. Rhamnus coluhrinus, Jacq. Ilort. Vind. iii. t. f>0. R.ferrugineus, Nutt. Jour. 

 Acad. Philad. vii. 90 ; Torr. & Gray, Fl. i. 263. Ceanothus coluhrinus, Lam. 111. ii. 90. Per- 

 fonon? ferriigineum, Eaf. Sylv. Tellur. 29. Marcorella colubrina, Eaf. 1. c. 31. — S. Florida 

 and Florida Keys. (W. Ind.) 



C. reclinata, Brongn. A large tree, the old trunks deeply fissured : twigs slendei-, sulcate, 

 soon glabrous : leaves not at all 3-uerved, thinner, glabrate, not rusty, scarcely 3 inches 

 long, with a few submarginal glands beneath : inflorescence becoming glabrous : fruit 

 about as in the last. — Me'm. Rhamn. 62, & Ann. Sci. Nat. x. 369; Griseb. Fl. W. Ind. 101 ; 

 Eggers, Bull. U. S. Nat. Mus. no. 13, 40 ; Trelease, 1. c. 368 ; Sargent, Silv. ii. 49, t. 66. 

 Ceanothus reclinatus, L'Her. Sert. 6. Rhamnus ellipticus, Ait. Kew. i. 265 ; Swartz, Prodr. 

 50. Zizyphus Domingensts, Nouv. Duham. iii. 56. Diplisca elliptica, Raf. 1. c. — S. Florida 

 and Florida Keys. (W. Ind.) 



11. ADOLPHIA, Meisu. (Named for AdoJphe Brongniart, a Prench 

 botanist of the early half of the century, and monographer of the order.) — 

 Shrubs with divaricate spine-tipped opposite twigs articulated with the stem, small 

 mostly caducous leaves, and inconspicuous flowers in sparse axillary clusters. — 

 Gen. i. 70, ii. 50; Benth. & Hook. Gen. i. 384; Baill. Hist. PI. vi. 90; Tre- 

 lease, Trans. St. Louis Acad. v. 361, 369; Weberbauer in Engl. &, Prantl, 

 Nat. Pflanzenf. iii. Ab. 5, 423. — Of the warmer American region ; perhaps 

 scarcely separable from Colletia. 



