404 RHAMNACE^. Rhamnidium. 



recurved in fruit : drupe ovoid, 7 lines long. — Zizyphus Parryl, Torr. Bot. Mex. Bound. 

 46 ; Brew. & Wat. Bot. Calif, i. 99 ; Trelease, 1. c. ; Kellogg, W. Am. Sci. vii. 64, fig. — 

 S. California. (Lower Calif, and adj. ids.) 



2. RHAMNIDIUM, Reiss. (Name from pd/xvos, the buckthorn, and e'Sos, 

 form.) — Shrubs or small trees with thornless twigs often roughened by promi- 

 nent lenticels, mostly subopposite firm entire pinnately veined medium-sized 

 leaves with minute stipules, and short-peduncled axillary cymes. — Reiss. in 

 Mart. Fl. Bras. xi. pt. 1, 94; Benth. & Hook. Gen. i. 378; Baill. Hist. PI. 

 vi. 74 ; Sargent, Silv. ii. 27. — Of the tropical American region, ours from the 

 West Indies and differing from the representative Brazilian species in its apetalous 

 flowers, firmer stone, etc. 



R. ferreum, Sargent. (Black Iron-wood.) Smalltree : twigs somewhat velvety : leaves 

 broadly elliptical, emarginate and mucronate, entire or wavy, minutely subrevolute, thin but 

 coriaceous, glossy above, glabrous except for the short petiole and upper surface of midrib, 

 paler beneath, drying very dark, 12 to 18 lines long : peduncle a line long, short-forked, the 

 pedicels becoming 2 or 3 lines long in fruit : drupe globose-ovoid; style short, forked nearly 

 to the middle. —Card. & For. iv. 16, & Silv. ii. 29, t. 58. Rliamnus ferreus, Vahl, Symb. 

 pt. 3, 41, t. 58. Mjiginda integrifolia, Lam. Diet. iv. 396. Zizyphus emarginatus, Sw. Fl. Ind. 

 Occ. iii. 1954. Ceanothus ferreus, DC. Prodr. ii. 30. Sctttia ferrea, Brongn. Mem. Khanm. 

 56, & Ann. Sci. Nat. x. 363. Conda I ia ferrea, Griseb. Fl. W. Ind. 100; Gray, Bot. Gaz. iv. 

 208; Chapm. Fl. ed. 2, 612; Eggers, Bull. U. S. Nat. Mus. no. 13, 40; Trelease, 1. c. 362. 

 Sarcomii/ialusi ferreus, Weberbauer, 1. c. 405.— S. Florida and Florida Keys. (W. Ind.) 



3. MICRORHAMNUS, Gray. (Name from /xt/cpd?, small, and pa/Avos, 



the buckthorn, because of the minute leaves.) — Small intricately branched very 



spiny shrub with alternate fascicled entire 1-nerved small heath-like revolute 



leaves with minute stipules, and solitary axillary flowers. — PI. Wright, i. 33; 



Benth. & Hook. Gen. i. 376 ; Trelease, Trans. St. Louis Acad. v. 360, 363 ; 



Weberbauer in Engl. & Prantl, Nat. Pflanzenf. iii. Ab. 5, 405. — A single 



species. 



M. ericoides, Gray. Glabrous or exceptionally minutely puberulent : leaves elliptical, acute, 

 revolute to the broad midrib, tlie enclosed grooves densely short-tomeutose, 1 to 3 lines long, 

 sessile ; stipules broadly triangular, ciliate ; pedicels about a line long : drupe oblong, 3 or 

 4 lines long, the slender style disarticulating from its abruptly pointed summit. — PL 

 Wright, i. 34, ii. 28 ; Torr. &" Gray, Pacif. R. Rep. ii. 162 ; Trelease, 1. c. 363. — W. Texas. 

 (Northern Mex.) 



4. BERCH£1MIA, Neck. (Name of unknown derivation, but supposed 

 to be personal.) — Shrubs or small trees (ours twining) with spineless twigs, al- 

 ternate thin entire pinnately veined ample slender-petioled leaves, minute stipules, 

 and rather loose more or less leafy terminal panicles. — Elem. Bot. ii. 122; 

 Brongn. Mem. Rhamn. 49, & Ann. Sci. Nat. x. 356; Gray, Gen. 111. ii. 173; 

 Benth. & Hook. Gen. i. 377 ; Baill. Hist. PI. vi. 78 ; Trelease, Trans. St. Louis 

 Acad. V. 360, 363 ; Weberbauer in Engl. & Prantl, Nat. Pflanzenf. iii. Ab. 5, 405. 

 Oenoplea, Hedw. f. Gen. i. 151. Oenoplia, Schult. Syst. v. 332. — Of the Asiatic 

 region, one species African, and ours peculiar to Eastern North America. 



B. volubilis, DC. (Supple Jack.) Climbing over trees to a great height, glabrous 

 throughout : leaves ovate, acute or narrowly acuminate-cuspidate, undulate and slightly 

 revolute, an inch or two long : drupe blue, ellipsoidal, 4 lines long, the style deciduous near 

 the base. — Prodr. ii. 22 ; Brongn. Mem. Rhamn. 50, & Ann. Sci. Nat. x. 357 ; Torr. & Gray, 



