Diervilla. EUBIACEJ. 19 



vellow and villous on the face: capsule oliLing, with a slender neck or beak, crowned witli 

 slender-subulate calyx-lobes. — Jleth. 492; 'I'orr. & Gray, 1. c. excl. var. D. Acadiensis 

 fruticosa, &c., Tourn. Act. Acad. Par. 1706, t. 7, f, 1 ; L. Hort. Cliff. 6-3, t. 7 ; Duham. Arb. 

 ed. 1. D. Tournefortii, Michx. Fl. i. 107. Z>. humilis, Pers. Syn. i. 214. D. (.'anadeiihis, 

 Willd. Enum. 222 ; DC. Prodr. iv. 330 ; Hook. Fl.i. 281. i>. /»/ea,Pursh, Fl. i. 102, Lui,h,-ra 

 DienUla,^,. ilat. Med. 62, & Spec. 1. 175. — liucky and shady ground, Xewfoundland and 

 Hudson's Bay to Saskatchewan, south to Kentucky and ^Maryland, and in the mountains t" 

 X. Carolina. 



D. sessilifolia, Bccklet. Branchlets quadrangular : leaves ovatedanceolate, gradually 

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

 corolla-lobes nearly equal, shorter than the tube, one of them obscurely pilose : cajisule sliort- 

 oblong, short-necked, and crowned with short lanceolate-subulate caiyx- lubes. — Am. Jour. 

 Sci. xlv. 174 ; Chapm. Fl. ITil ; Fl. Serres, viii. 292. — liucky woods and bunks, mountains of 

 Carolina and Tennessee, first coU. bv Curtis. 



Order LXX. RUBLiCE.E. 



Herbaceous or woodr plants : witli opposite entire and stipulate leaves, varv- 

 ing to verticillate, or in the SfeUuta: the leaves in -nhorls without stipules (unle.ss 

 accessory leaves be counted as such) ; mostly hermajDhrodite regular flowers, 

 either 5-merous or 4r-merous ; calyx-tube adnate to the ovarv ; and stamens as 

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

 throat. Style single, sometimes with 2 or more lobes or stigmas. Fruit variou.^ : 

 seeds in our genera albuminous. 



Of this vast and largely tropical order 20 of the 140 recognized genera come 

 within our limits, but more than half of them only in .subtropical Florida. They 

 rank under 14 of the 2.!i recognized tribes. — too large a scatfoldina' for a frag- 

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

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



Series I. Cixchoxace.e. Ovules numerous in each cell. 

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



1 . EXOSTEMA. Cal\-x with clavate tube, 5-toothed. Corolla salverform, with long and 

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

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

 linear, fixed by the base. Capsule 2-celled, septicidal Seels downwardly imbricated on the 

 placenta;. 



2. PINCKXEYA. Calyx with clavate tube; limb of 5 subulate-lanceolate lobes, 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 tlrroat, and 5 oblong recurved- 

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

 filaments filiiorm : anthers oMoug, fixed by the middle, slightly exsened. Style exserted: 

 stigma liarely 2-lobed. Capsule didymous-slobular, 2-celled, loculieidal, and valves at length 

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

 comparatively large embryo : cotyledons broad. 



3. BOUVARDIA. Flowers heterogone-dimorphous. 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, loculieidal. Seeds peltate, somewhat meniscoidal, imbricated on the globular 

 placentae. 



