324 ACANTHACEiE. 



Elytraria. 



spike or a cluster of spikes : bracts ovate, cuspidate-acuminate : corolla white (3 or 4 lines 

 long): seeds nearly smooth and even. — Fl. i. 9, t. 1 ; Vahl, 1. c; not " E. Vahliana," as 

 says Nees in DC. Prodr. xi. 63. Anomjmos Carolinensis, Walt. Car. 69. Tubiftora Caroli- 

 nensis, Gmel. Syst. E. cupressina, Nees, 1. c. 65, if N. Amer. ? — Low grounds, S. Carolina 

 to Florida : fl. summer. 



E. tridentata, Vahl, 1. c. Acaulescent or with proliferous low stems : leaves lanceolate 

 or oblong, 2 or 3 inches long, clustered, as are the hardly longer peduncles or scapes, either 

 at the root or at the summit of naked stems : spikes slender: bracts ovate, mostly searious- 

 margined ; the upper commonly tricuspidate or aristate : corolla purple. — Griseb. Fl. W. 

 Ind. 451 ; Torr. Bot. Mex. Bound. 122. E. ramosa, frondosa, fasciculate, &c, HBK. ; Nees, 



1. c. — Arizona and New Mexico, along the Mexican border. (Mex. to W. Ind. & S. Brazil.) 



2. HYG-ROPHILiA, R. Br. (From 'vygog, moist, and cpiXla, affection ; 

 plants which affect wet places.) — A large tropical genus, of which a single species 

 reaches the southernmost Atlantic States. 



H. lacustris, Nees. Nearly glabrous : stem simple, 2 or 3 feet high from a creeping 

 base: leaves lanceolate, sessile, entire (about 4 inches long), scabrous-ciliolate : flowers 

 small, white : calyx-lobes and bracts subulate-lanceolate : anthers of the shorter stamens 

 smaller. — DC. Prodr. xi. 86. JRuellia lacustris, Schlecht. in Linn. v. 96. R. justickeflora, 

 Hook. Comp. Bot. Mag. i. 170. — Swamps, Texas and Louisiana, Drummond, Riddell, Lind- 

 heiiher, &c. W. Florida, Saurman. (Mex.) 



3. CALdPHANES, Don. {Kalog, beautiful, and qaiva, to appear.) — 

 Low perennials, branched from the base, pubescent or hirsute, usually with pro- 

 portionally large or showy axillary flowers, either solitary or usually clustered 

 and nearly sessile ; the corolla blue or purplish, rarely white ; its tube not longer 

 than the calyx. Seeds as in Ruellia, or the hairs nearly destitute of rings or 

 spiral fibres. Fl. summer. 



* Eastern-Atlantic species : calyx deeply 5-parted : stems from slender creeping base or rootstocks : 

 flowers solitary or few in the axils. 



C. humistrata, Nees. Glabrous or almost so throughout, no hirsute hairs : stems weak, 

 erect or decumbent from the creeping base : leaves thinnish, oblong-obovate or the upper- 

 most oblong, narrowed at base into a petiole (6 to 18 lines long) : corolla white, barely half 

 inch long, seldom longer than the obovate or oblong foliaceous bractlets ; the tube very 

 short : sepals setaceous-aristiform from an oblong-lanceolate base, little shorter than the 

 corolla : anther-cells oblong, barely mucronulate. — DC. Prodr. xi. 108. Ruellia humistrata, 

 Miclix. Fl. ii. 23. Dipteracanthus ( Calophanes) riparius, Chapm. Fl. 303, a luxuriant form. 

 — Low grounds, S. Georgia and Florida. 



C. oblongifolia, Don. Pubescent or soft-hirsute, sometimes glabrate: stems usually 

 erect and simple, a span to a foot high : leaves from narrowly oblong to oval, very obtuse, 

 sessile (an inch or less long) : corolla blue, sometimes purple-dotted or mottled, seldom an 

 inch long, twice the length of the narrowly oblong bractlets ; the tube shorter than the 

 ample throat : sepals distinct almost to the very base, filiform-setaceous, hirsute, more than 

 half the length of the corolla: anther-cells oblong-linear, aristulate. — Brit. Fl. Gard. ser. 

 2, t. 181; Nees, 1. c. (Ruellia biflora, L. Spec. ii. 635, may be this, but it rests on a mere 

 mention by Dillenius, without character.) Ruellia oblongifolia, Michx. Fl. ii. 23; Pursh, Fl. 

 ii. 420. Dipteracanthus biforus, Nees in Linn. xvi. 294. D. ob/onr/ifolius, Chapm. 1. c. — Sandy 

 pine barrens, S. Virginia to Florida. An almost glabrous large form in Florida. 



Var. angusta. A reduced form, a span or so high, nearly glabrous, very leafy : 

 leaves and flowers only half inch long, most of the former oblong-linear. — Dipteracanthus 

 linearis, Chapm. 1. c. — S. Florida; Key West and Biscayan Bay, Blodgett, Palmer. 

 # # Texano-Arizonian species : calyx 5-cleft. 



C. linearis. Hirsute with somewhat rigid and short hairs, or glabrate, not cinereous : 

 stems erect and strict (a span to a foot high), or branched and diffuse: leaves from linear- 

 oblanceolate to oblong-spatulate (9 to 20 lines long)', rather rigid : flowers usually foliose- 

 glomerate : bracts and bractlets similar to and equalling the subtending leaves and about 



