$34 Order 87.— ACANTHACEJE. 



1. THUNBER'GIA, L. (In honor of C. P. Thunherg, Prof, of Bot. at 

 Upsal). Calyx short, truncate or many-toothed, subtended by 2 bract- 

 lets; corolla funnel-bell- form, throat inflated, limb 5-cleft, subregular; 

 stamens 4, didynamous ; anthers cells parallel, ciliate, one of them awned 

 at base ; capsule globular, 3 to 4-seeded. — Shrubs or climbing herbs of 

 the Old World. 



1 T. grandiflora Roxb. Climbing; Ivs. cordate, angled, acuminate, hispid; 

 cal. limb truncate, entire. — In cultivation, a hardy perennial climber, clothed all 

 over with fine reversed hairs, with large blue llowers \V deep and 3' broad, f E. 

 Jnd. Variable. 



2 T. alata Bojer. Twining, silky-villous ; lvs. cordate-sagittate, acute, on 

 winged petioles; col. \2-cleft, bracteoles repand. — In cultivation, perennial, the 

 whole plant soft-villous. Lvs. repand, and 6-veined. Fls. large, yellow, with a 

 purple base, l¥ deep, campanulate with a curved tube, f E. Africa. Variable. 



2. ELYTRA'RIA, Vahl. (Gr. eXvrpov, an envelope or bract; from 

 the bractcd inflorescence.) Calyx 5 or 4 parted, segments unequal ; 

 corolla bilabiate lower lip or 3 bifid segments; stamens 2 fertile, 2 

 sterile, included ; anther cells parallel ; capsule 8-seeded from the 

 base, without hooks. — Herbs acaulescent, with radical lvs. Scape cov- 

 ered with oppressed leaf-like, clasping scales. Fls. small, one beneath 

 each bract of the terminal spike. 



1 E. virgata Mx. Scapes several, slender, terete, glabrous, erect, covered with 

 ovate, clasping, cuspidate, alternate scales; lvs. radical, narrow-oblong, tapering 

 long to the petiole, repand or wavy; fls. in a dense, imbricated spike, each flower 

 covered by a broadly ovate, coriaceous, cuspidate, ciliate scale; cal. with 2 linear 

 bractlets which are villoua-ciliate as well as the segments ; cor. white, with its 5 

 segm. nearly equal. — AVet plains S. Car. to Fla. (Mettauer). Scapes If higli- 

 Lvs. 3 to G' long, 5 to 8" wide. Fls. 4" broad. Summer. (Anonj-inus Caroli- 

 nensis "Walt.) 



3. CALOPH'ANES, Don. (Gr. nakog, fair, (paivu, to appear.) Calyx 

 segments setaceous, much longer than the tube ; corolla funnel-form, 

 limb subregular, o-lobcd ; stamens 4 ; anther cells spurred or mucron- 

 atc at base, parallel; capsule lanceolate, empty below, 4-scedcd in the 

 middle ; flowers axillary, opposite, mostly solitary, with narrow bracts 

 and bractlets. — Low, pubescent herbs with blue corollas spotted in the 

 throat. 



1 C. oblongifolius Don. Densely pubescent, ascending from a procumbent or 

 creeping base ; lvs. obovate, obtuse, obscurely denticulate, narrowed to the sub- 

 sessile base ; fls. solitarj'-, subsessile, opposite, with oblong bractlets equaling the 

 deeply parted calyx and the corolla tube. — 2f Pine barrens and gravelly plairjs, 

 Ga. and Fla. common. Herb 6 to 12', branched at base, simple above. Lvs. 

 1' long, rarely rather acute. Cor. showy, a little exceeding the lvs., purplish 

 blue, with deeper purple spots. Apr. (Ruellia oblongifolia Mx:. Ph.) 



2 C. Iramistratus Shutt. Smooth, prostrate, diffuse; lvs. oblong, oval, rather 

 obtuse, entire, narrowed to a petiole ; fls. axillary, subsessile, solitary or 2 or 3 

 together; bracts oblong-spatulate, shorter than the strict, setaceous calyx segm. — 

 ISr S. Car. to Fla., in rich soils. Lvs. distinctly petiolate. Cal. segm. very slender, 

 scabrous, membranous edged below, 5" long, equaling the 4-seeded capsule. 

 (Ruellia humistrata, Mx.) 



4. DIPTERACAMTHUS, Nces. (Gr. dim-epos, two-winged, ah-avOoc, 

 Acanthus.) Calyx deeply 5-cleft ; corolla funnel-form, limb snbequally 

 5-lobed; stamens 4, included; anther cells parallel, not awned; cap- 

 sule compressed and empty at base, 2 to 12-seeded above; seeds orbic- 

 ular, compressed, with hooked, abrupt processes. — Mostly herbs with 



