326 ACANTHACE^. Ruellia. 



form : capsule puberulent. (Torr. in herb., unpublished.) — Dry woods, in W. Louisiana, 

 ./. Hale. Arkansas, Bigelow, Mrs. Harris. Corolla about an inch and a half long. 



* » * Flowers subses.sile and commonly glomerate in the axils, when sliort-pedimcled with 

 foliaceous primary bracts or bi'actlets: stamens of almost equal length: capsule at most 8-,seed«d: 

 short hispid hairs of the seed spreading when wet, containing a fixed spiral flbre or band, but no 

 uncoiling spiricles. 



H^ Suffrutescent; leaves rigid: corolla white: capsule oblong, with hardly any stipe-like base. 



R. Parryi. A span high, much branched from the lignescent base : leaves obovate-oblong, 

 or the upper oblong-lanceolate, tapering into a distinct petiole, hispid-ciliate, otherwise 

 glabrate, an inch or less long (the older have cystoliths) : flowers mostly solitary in tlie 

 axils, on a peduncle shorter than the petiole or subsessile : bractlets oblong, surpassing 

 the slender-subulate often unequal calyx-lobes : tube of the corolla (inch long) slender, 

 dilated at the summit into a small narrowly funnelform throat, which is shorter than the 

 lobes. — Dipteracantlius suffruticosus, Torr. Bot. Mex. Bound. 122 (but there is a B.. siiffru- 

 ticosa, Woxh.). — South-western borders of Texas: at Presidio del Norte, Parr^, in flower. 

 Valley of the Pecos, in fruit, Wri(jht. 



•i 1— Herbaceous: stems mostly simple: corolla usually blue or violet, except in It. tubijlora: 



capsule more bi'oadly clavate and obcompressed. 



■H- Calyx-lobes filiform-attenuate, longer than the capsule: cleistogamous flowers seldom seen. 



R. noctiflora. Puberulent, or very young parts soft-villous, a foot or less high : leaves 

 narrowly oblong (1 to 3 inches long), mostly with tapering base, but sessile: bracts and 

 bractlets of the solitary or few flowers linear-lanceolate : calyx generally soft-puberulent ; 

 its lobes somewhat linear-fllii'orm and hardly widened at base (sometimes 18 lines long), 

 barely half the length of the elongated (fully 2 inch) tube of the white corolla, the throat 

 of which is funnelform. — R. lubiflora, LeConte in Ann. Lye. N. Y. i. 142, not HBK. 

 ZJipleracanlluis nocliflorus, Nees in DC. I.e., partly; Chapm. Fl. 304. — Low pine-barrens, 

 Lower Georgia, Le Conle. W. Florida, Rugel, Chapman, &c. S. Mississippi, Liyalls. Night- 

 blooming 1 



R. ciliosa, Pursh. Usually hirsute with long spreading hairs, especially the (about inch 

 long) filiform attenuate calyx-lobes : leaves oblong or the lower oval (an inch or two long), 

 almost sessile : tube of the blue corolla commonly twice the length of the calyx and of the 

 limb with the obconical throat, the whole not rarely 2 inches long. — Fl. i. 420 ; Gray, Man. 

 ed. 5, 339. Dipteracantlius ciliosus, Nees in Linn. xvi. 294, & Prodr. 1. c, with var. hijhridus, 

 mainly. — Dry ground, Michigan and Illinois to Florida and Louisiana : in various forms. 



•Var. longiflora. Pubescence sometimes cinereous, with or without long hirsute 

 hairs : stems sometimes flowering wlien 2 or 3 inches high, sometimes tall and slender ; 

 leaves narrowly oblong or the lower obovate-spatulate, usually small : slender tube of 

 corolla 1 or 2 inches long. — 7?. luimilis, Nutt. in Trans. Am. Phil. Soc. n. ser. v. 182. Jus- 

 ticia, with char. & no name, Torr. in Ann. Lye. N. Y. ii. 236. Dipteracanlhus Drummondii, 

 Torr. & Gray in PI. Lindh. i. 50. D. noctijtorus, Nees, in DC. 1. c, as to Texan pi. and var. 

 kiimi/is, also D nhosiis, var. hi/hridiis, in part. — Louisiana, Arkansas, and Texas. 



Var. hj'brida. Either liirsute or cinereous-pubescent, sometimes almost velvety- 

 pubescent : leaves from ovate to oblong, mostly with distinct petioles : tube of the corolla 

 shorter than the throat and limb, sometimes shorter than the linear-setaceous calyx-lobes, 

 which often want the hirsute hairs. — R. hi/hrida, Pursh, Fl. ii. 420; LeConte in Ann. 

 Lye. I. c. R. sirepens, L. as to Dill. Elth. t. 240, at least in part. R. hirsula. Ell. Sk. ii. 109. 

 JJipteracant/iHS ciliosus, var. hi/hridns, in part, & D. MitrhiUianus, Nees, 1. c. D. strepens, var. 

 Diltenii, Nees, 1. c. — S. Carolina to Florida. Verges to the two following species. 



Var. ambigua. Sparingly hirsute-pubescent or glabrate : leaves ovate-oblong, usu- 

 ally short-petiolcd, larger: tube of corolla little exceeding the hardly hirsute calyx. — 

 Dipterocarpus ciliosus, var. paroijiorus, Nees, 1. c. — Virginia and Kentucky to Alabama. As 

 if a hybrid between R. ciliosa and R. strepens, with aspect of the latter, but the caly.\ of 

 the former. 



R. Drummondiana. Chieroous-puberulent, tall ; leaves ovate, 3 to 6 inches long, peti- 

 oled : filiform-sefaceous and eanescent calyx-lobes (commonly an inch or more long) more 

 or less shorter than the tube of the (inch and a half long) corolla. — Dipteracanlhus Driim- 

 mondianus, Nees in DC. 1. c. D. Lindlieimerianus, Scheele in Linn. xxi. 764, 1848. — Texas, 

 Dramiiiond, Lindkeimer. 



