418 RHAMXACE.E. Coluhrina. 



10. COLUBRINA, Rich. (Name from Latin Coluher, a serpent, the ap- 

 plication uncertain.) — 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. Rluunn. 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 inediuin-sizeil or usually rather small, some of them denticulate : common peduncle 

 verv short or wanting: cahx-segments tardily and incompletely deciduous: fruit short- 

 I)caked by the persistent style. 



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

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

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

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

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

 Torr. Ik)t. 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 amide, entire, elliptical to ovate-lanceolate: common peduncle evident : calyx- 

 segments soon falling : styles deciduous at base. 



C. f erruginosa, Bkongn. 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-tonientose even in fruit : capsules 2 to 4 

 lines in diameter, little grooved, more cktstered than in our other species ; pedicels rather 

 stout, the longer becoming 4 or .5 lines in length. — M^ra. Rhamn. 62, t. 4, f. 3, & Ann. 

 Sci. Nat. X. 369 ; Griseb. Fl. W. Ind. 100; Trelease, 1. c. 369. C./ern/f/Zneo, Brongn. Me'm. 

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

 Chapm. Fl. 74. R/ntmnus colubriniis, ,Tacq. Ilort. Vind. iii. t. .50. R. ferrugineus, Xutt. Jonr. 

 Acad. Philad. vii. 90; Torr. & Gray, Fl. i. 26:5. Ceanothns cohtbrinus. Lam. 111. ii. 90. Prr- 

 foiiun? ferrugineum, Raf. Sylv. Tellur. 29. Marcorella coluhrina, Raf. \. c. 31. — S. Florida 

 and Florida Keys. (W. Ind.) 



C. reclinata, Brongn. A large tree, the old trunks deej)ly fissured : twigs slender, sulcate, 

 soon glabrous : leaves not at all 3-nerved, tliinner, glabrate, not rusty, scarcely 3 indies 

 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. Rhamnns ellipticus, Ait. Kew. i. 265; Swartz, Prodr. 

 50. Zizi/phus Domimjensis, Nouv. Duham. iii. 56. Diplisca eltiptica, Raf. 1. c. — S. Florida 

 and Florida Keys. (W, Ind.) 



11. AD6LPHIA, Meisn. (Named for Adolphe Brongniart^ a French 

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

 Shrubs with divaricate spine-tipped opposite tw'igs 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. 



