$34 ORDER 87. ACANTHACE.E. 



' 1. THUNBER GIA, L. (In honor of C. P. Thunlenj, Prof, of Bot. af 

 t/psal). 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 a wired 

 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 iruncate, entire. In cultivation, a hardy perennial climber, clothed all 



1 over with fine reversed hairs, with large blue flowers !' deep and 3' broad, f E. 

 , Ind. Variable. 



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

 * winged petioles; cal. 11-cleft, bracteoles repand. In cultivation, perennial, the 



"whole plant soft-villous. Lvs. repand, and 5-veined. Fls. large, yellow, with a 

 purple base, li' deep, campanulate with a curved tube, f E. Africa. Variable. 



1 2. ELYTRA'RIA, Yahl. (Gr. ZXvrpov, an envelope or bract; from 

 t)ic 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 Ivs. Scape cov- 

 ered with appressed 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; Ivs. radical, narrow-oblong, tapering 

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

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



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

 ' : segm. nearly equal. Wet plains S. Car. to Fla. (Mettauer). Scapes If high. 



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

 nensis Walt.) 



' 3. CALOPH'ANES, Don. (Gr. KaAof, fair, (fxitvu, to appear.) Calyx 

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

 limb subregular, 5-lobed ; stamens 4 ; anther cells spurred or mucion- 

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

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

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

 throat. i.-^j 



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

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



' sessile base ; fls. solitary, subsessile, opposite, with oblong Lractlets equaling the 



deeply parted calyx and the corolla tube. 11 Pine barrens and gravelly plains, 



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 Ivs., purplish 



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



2 C. humistratus Shutt. Smooth, prostrate, diffuse; Ivs. 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. 

 1( 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. DIPTERACANTHUS, Necs. (Gr. dfcrrepof, two --winged, at 

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

 6-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 



