Macrosiphonia. APOCYNACE/E. 83 



cymes loose, spreading, naked and mostly surpassing the leaves : corolla flesh-color, open- 

 campanulate (3 or 4 lines long) with revolute lobes ; the tube exceeding the ovate acute 

 calyx-lobes. — Spec. i. 213 ; Lam. 111. t. 170 ; Bot. Mag. t. 280 ; Bigel. Med. t. 36. — Borders 

 of thickecs, Canada to Georgia, New Mexico, California, and Brit. Columbia. Var. incanum, 

 A. DC, is the downy-leaved form, not uncommon northward. 



"Var. pumilum, a very low and peculiar round-leaved form, common from California 

 to Brit. Columbia. 



A. cannabixmrn, L. Erect or ascending, glabrous or sometimes soft-pubescent : branches 

 ascending, leafy to the top : leaves from oval to oblong and even lanceolate, from short- 

 petioled to sessile, with a rounded or obscurely cordate base : cymes erect, densely flowered : 

 corolla greenish-white or slightly flesh-color, smaller than in the preceding, with almost 

 erect lobes, and tube not longer than the lanceolate calyx-lobes. — .Spec. 1. c. ; Hook. Fl. 

 t. 139; Gray. Man. ed. 5, 394. A. hypericifolium, Ait. Kew. ed. 1, i. 304; Hook. 1. c. t. 140- 

 form with mostly sessile and sometimes subcordate leaves. A. Sibiricum, Jacq. Vind. iii. 

 t. 66. A. pubescens, R. Br. in Wem. Soc. i. 67 ; the downy form. — Moist grounds and banks 

 of streams, same range as the preceding, and more southern ; occurring in a much greater 

 number of forms, hardly to be distinguished as named varieties. 



6. CYCLADlSNIA, Benth. (kwloz, a ring, and u8i]v, gland, from the 

 circular glandular disk around the pistil.) — Low perennial herbs (Californian) ; 

 with a creeping rhizoma sending up a simple stem, hardly a span high, and bear- 

 ing 2 or 3 pairs of opposite petiolate leaves, of a thickish texture, and one or two 

 slender terminal or apparently axillary peduncles, with a few rose-purple flowers 

 on slender pedicels, developed in spring. — PI. Hartw. 322. 



C. Mmilis, Benth. Glabrous and green, or pruinose when young : leaves ovate or 

 obovate, thickish, 1 to 3 inches long : calyx-lobes from lanceolate to nearly linear : corolla 

 three-fourths inch long. — Yuba to Shasta Co., California, in the mountains, Hartweg, 

 Brewer, &c. 



C. tomentosa, Gray. Densely tomentose-pubescent throughout : leaves ovate and 

 oblong, 2 or 3 inches in length: calyx hirsute. — Bot. Calif, i. 474. -^ Plumas Co., Cali- 

 fornia, with the preceding, Lemmon. 



7. MACROSIPH6NIA, Muell. (Arg.) (Urcaooc. long, and aiq>wv, tube, 

 in reference to the corolla.) — Erect suffrutescent or more woody plants (of Mexico, 

 Texas, and Brazil) ; with rather simple stems or branches, numerous opposite or 

 sometimes verticillate leaves, and proportionally large showy flowers, either ter- 

 minal or becoming lateral, on short peduncles or pedicels ; the corolla commonly 

 soft-puberulent or tomentose outside. Follicles erect. — Mart. Fl. Bra's, vi. 137, 

 t. 42, 4o ; Benth. & Flook. Gen. ii. 727. — Flowers in ours white or externally 

 tinged with rose-color, vespertine, fragrant, in spring or summer ; the leaves 

 very short-petioled. 



M. Berlandieri. A foot or two high, shrubby, white-tomentose : leaves from oval or 

 cordate-ovate to orbicular (an inch and more long), becoming greenish and merely pubes- 

 cent above, the diverging veins at length conspicuous : corolla merely puberulent outside, 

 its slender tube (with the cylindraceous-dilated throat) 3 to 5 inches long, many times 

 exceeding the calyx and the round-obovate (nearly inch long) lobes. — Echites macrosiphon, 

 Torr. Bot. Mex. Bound. 158, t. 43. — Rocky soil, W. Texas and adjacent parts of Mexico, 

 Berlandier, Wright, Lindheimer. 



M. Wrightii. Slender, branching, a foot high, soft-puberulent : leaves narrowly lan- 

 ceolate, acute, white-tomentulose beneath, glabrous or nearly so above : tube of the corolla 

 and its cylindraceous throat each half inch or more in length, tomentulose, the lobes 

 half inch long. — W. Texas, in mountains beyond the Limpio, Wright. 



M. brachysiphon. A span to a foot high, branching, minutely puberulent, green or 

 barely cinereous : leaves oblong or ovate, acute or mucronate-pointed, or some rounded at 



