Dicrvilla. RUBIACE.'E. 19 



yellow and villous on the face : capsule oWong, with a slender nock or beak, crowned with 

 slender-subulate calyx-lobes. — Meth. 492; Torr. & Gray, 1. c. excl. \ar. D. Acadiensis 

 /ruticosa, &c., Touru. Act. Acad. Par. 170G, t. 7, f. 1 ; L. llort. Cliff. G3, t. 7 ; Duham. Arb. 

 ed. 1. D. Tournefortii, Michx. Fl. i. 107. D. humilis, Pers. Syn. i. 214. D. Canadensis, 

 Willd. Enuni. 222 ; DC. Prodr. iv. 3.30 ; Hook. Fl. i. 281. i*. /(/tea.Pursh, Fl. i. 1G2. Lonicera 

 DicrclUu, L. Mat. Med. 62, & Spec. i. 175. — Rocky and shady ground, Newfoundland and 

 Hudson's Bay to Saskatchewan, south to Kentucky and Slaryland, and in the mountains to 

 N. Carolina. 

 D. sessilif olia, Buckley. Branchlets quadrangular : leaves ovate-lanceolate, gradually 

 acuminate, closely sessile, of firmer texture, more acutely serrulate : cymes several-flowered ; 

 corolla-lobes nearly equal, shorter thau the tube, one of them obscurely ])ilose : capsule short- 

 oblong, short-necked, and crowued with short lanceolate-subulate calyx- lobes. — Am. Jour. 

 Sci. xlv. 174; Chapm. Fl. 170 ; Fl. Serrcs, viii. 292. — liocky woods aud banks, mountains of 

 Carolina and Tennessee, first coll. by Curtis. 



Order LXX. RUBIACE^. 



Herbaceous or woody plants ; with opposite entire and stipulate leaves, vary- 

 ing to verticillatc, or in the Stellatce the leaves in whorls without stipules (unless 

 accessory leaves be counted as sucli) ; mostly hermaphrodite regular flowers, 

 either o-merous or 4-merous ; calyx-tube adnate to the ovary ; and stamens as 

 many as and alternate with the lobes of the corolla, inserted on its tube or 

 throat. Stjde single, sometimes with 2 or more lobes or stigmas. Fruit various : 

 seeds in our genera albuminous. 



Of this vast and largely tropical order 2G of the 140 recognized genera come 

 within our limits, but more than half of them onl}' in subtropical Florida. They 

 rank under 14 of the 25 recognized tribes, — too large a scaffolding for a frag- 

 mentary structure. So they are here disposed under three series ; of which the 

 tliird is only a special modification in foliage of the second. 



Series I. CiNCiioxACEyE. Ovules numerous in each cell. 

 * Fruit capsular: seeds numerous, flat, winged all round. 



1. EXOSTEMA. Cah'x Avith clavatc tube, 5-toothed. Corolla salverform, with long aud 

 narrow tube and .5-parted limb ; lobes long-linear, imbricated in the bud. Stamens inserted 

 near the base of the corolla-tube : filaments and style filiform, exserted : anthers slender- 

 linear, fixed by the base. Caj)sule 2-celled, septicidal. Seeds downwardly imbricated ou the 

 placentiE. 



2. PINCKNEYA. Calyx with clavatc tulie ; limb of 5 subulate-lanceolate lolies, or in the 

 outer flowers of the cyme one (or rarely two) of them an ample petaloid and petiolate leaf, 

 all deciduous. Corolla salverform with somewhat enlarging throat, aud 5 oblong recurved- 

 spreading lobes, valvate or nearly so in the bud. Stamens inserted low down on the corolla : 

 filaments filiform : anthers oblong, fixed by the middle, slightly exserted. Style exserted : 

 stigma barely 2-lobed. Capsule didymous-globular, 2-celled, loculicidal, and valves at length 

 2-parted. Seeds horizontal, with small nucleus, broad and thin lunate-orbicular wing, and 

 comparatively largo embryo : cotyledous broad. 



3. BOUVARDIA. Flowers heterogone-diniorphous. Calyx with turbinate or campanulate 

 tube, and 4 subulate persistent lobes. Corolla tubular or salverform, the 4 short lobes 

 valvate in the bud. Stamens inserted on the throat or on the tube below it: anthers sub- 

 sessile, oblong or linear. Style filiform and more or less exserted in long-styled flowers, much 

 shorter in the other sort : .stigmas 2, obtuse. Ovary 2-celled. Capsule didymous-globose, 

 coriaceous, loculicidal. Seeds peltate, somewhat meniscoidal, imbricated ou the globular 

 placenta. 



