Carlowrightia. ACANTHACE^. 327 



++ ++ Calyx-lobes lanceolate or linear, hardlv surpassing the capsule: cleistogamous flowers 

 common. 



R. strepens, L. Green and almost glabrous or pubescent, 1 to 4 feet high : leaves oblong- 

 ovate or oblong, 2 to 5 inches long, mostly contracted at base into a short petiole : calyx 

 sparingly soft-hirsute or ciliate : well-developed corolla 1£ or 2 inches long, with tube 

 about the length of the campanulate-funnelform throat and limb. — Spec, ii. 634 (partly) 

 & Mant. 422 ; Schk. Handb. 1. 177 ; Pursh, 1. c. Dipteracanthus strepens, Nees, 1. c, mainly. 

 — Dry soil, Penn. to Wisconsin, Florida, and Texas. 



Var. cleistantha. Leaves commonly narrower and oblong : flowers for most of the 

 season cleistogamous. — Dipteracanthus (Meiophanes) mlcranlhus, Engelm. & Gray, PI. Lindh. 

 i. 49. D. strepens, var. strictus, Nees, 1. c, mainly. Hygrophila lllinoiensis, Wood in Bull. 

 Torrey Club, v. 41. — Common with the ordinary form. 



5. STENANDBIUM, Nees. (Composed of o-i-evo's, narrow, and avSpuov, 

 the hall for men, alluding to the narrow corolla ?) — Low and small perennials, 

 all American, commonly with leaves all at base of scapiform flowering stems ; 

 the flowers spicate; corolla rose-colored or purple. 



S. dulce, Nees. Hirsute-pubescent or glabrate : leaves all radical, oval or oblong, thick- 

 ish, 9 to 10 lines long, either narrowed or abruptly contracted into a rather long naked 

 petiole : scape equalling or shorter than the leaves, capitately few-flowered : bracts lanceo- 

 late, longer than the calyx, usually hirsute-ciliate (either nerveless or 3-nerved) : tube of 

 the corolla narrow, rather longer than the calyx, the limb half inch or more in diameter : 

 capsule clavate-oblong, somewhat terete. — DC. Prodr. xi. 282, with S. trinerve. Ruellia 

 diJcis, Cav. Ic. vi. 62, t. 58-3, fig. 2. (Mex. to S. Chili.) 



Var. Floridanum. Glabrous, only the upper bracts and bractlets lightly hirsute- 

 ciliate. — Indian River, E. Florida, Palmer. 



S. barbatum, Torr. & Gray. Very hirsute with long and shaggy white hairs, many- 

 stemmed from the root ; a span or less high : leaves crowded, oblanceolate, attenuate at 

 base into an indistinct petiole, above passing into the lanceolate and crowded foliaceous 

 bracts of the rather many-flowered spike, which nearly equal the corolla : tube of the 

 latter hardly longer than the calyx ; limb over half inch in diameter : capsule ovate, 

 obcompressed, not attenuate at base: seeds hispid. — Pacif. R. Rep. ii. 168, t. 4, & Bot. 

 Mex. Bound. 122. — Hillsides, western borders of Texas and adjacent parts of New Mex- 

 ico, Wriyht, Gen. Pope, &c. 



6. BERG-lNIA, Harvey. (In honor of Mr. Bergin, of Dublin.) — Benth. 

 & Hook. Gen. ii. 1096. A single species. 



B, virgata, Harvey. Low and branching, apparently suffruticose, minutely cinereous- 

 puberulent : branches slender : leaves linear-oblong, nearly sessile (half inch long) ; the 

 upper smaller and passing into obscurely 3-nerved bracts of the loose and interrupted 

 spike: calyx rather longer than the bracts, 2-bracteolate : corolla probably white, less 

 than half inch long ; its lower lobe bearded at and below the base. — Gray, Bot. Calif, 

 i. 588. — " California," Coulter. Probably Arizona : not since found. 



7. CARLOWRlG-HTIA, Gray. (Charles Wright, the discoverer of one 

 species, the earliest explorer of the district it inhabits, a most assiduous and suc- 

 cessful collector and investigator of the botany of several parts of the world.) — 

 Much branched undershrubs, minutely cinereous-puberulent or glabrate ; with 

 slender branch! ets, small and narrow entire leaves, and rather small loosely 

 spicate or paniculate-racemose flowers : corolla purple. — Gray, Proc. Am. 

 Acad. xiii. 364. 



C. linearif olia, Gray, 1. c. A foot high, ericoid-leafy : leaves filiform-linear, 4 to 8 lines 

 long ; uppermost passing into similar bracts and bractlets of the somewhat paniculate in- 

 florescence : calyx deeply 5-parted; the divisions similar to and equalled by the bractlets : 



