Ruellia. ACANTHACE^. 325 



equalling the corolla : calyx-lobes subulate-setaceous, more or less liispid-ciliate, hardly 

 more than twice the length of the narrow tube : corolla purple ? ( 10 lines lung) ; the tube 

 not longer than the abruptly ampliate tliroat: anther-cells linear-oblong, aristulate. — 

 Dipteracanllms (Cahphanes) linearis, Torr. & Gray in PI. Lindh. i. 50. C. ocata, Benth. I'l. 

 Hartw. 89, as to Texan sp. ; Nees, 1. c. ; surely not Ruellia ocala, Cav. C. obloiigifolia, rar. 

 Texensis, Xees, 1. c. ; Torr. Bot. ilex. Bound. Vl'2 — Dry ground, Texas (Bedandier, Druin- 

 mond, Wiiylit, &c.) to the border of New Jlexico. (Adjacent Mex.) 

 C. decumbens. Cinereous-puberulent throughout, not at all hirsute, nor scabrous : 

 stems mostly spreading on the ground: leaves spatulate, or the lowest obovate and the 

 uppermost oblanceolate, with attenuate base, but hardly petioled (6 to U lines long)': 

 flowers few in the foliose-bracteolate clusters : setaceous-subulate calyx-lobes hardly twice 

 the length of the tube : corolla purple (8 or 10 lines long) ; its tube double the length of 

 the throat, nearly equalling the calyx-lobes: anther-cells oblong, mucronate. — Calophanes 

 oblongi/olia, Torr. Bot. Mex. Bound. 12.3, not Don. — Dry soil, western borders of Texas 

 ( Wriyhl, &c.) to S. Arizona, Thurber, Wright, Roihrock, &c. (Adjacent Mex.) 



4. RUfiLLIA, Plum. (/. Ruel, or de la RueUe, of France, early herbalist.) 

 — Large genus, chiefly American and tropical, perennials ; with mostly entire 

 and broad leaves, and rather large flowers (in summer), usually violet or lilac- 

 purple, solitary or commonly clustered in the axils or in evolute cymes ; in several 

 species the earlier or later blossoms cleistogamous. Seeds in many clothed with 

 fine appressed hairs, which when wetted diverge and elongate, either marked with 

 fixed spiral bands ordeveloping spiricles. — Benth. & Hook. Gen. ii. 1077. — Our 

 species all rank under Ruellia proper {Gryphiacanthus and Dipteracanthus, Nees 

 in DC), with straight tube and almost; or quite regular limb to the corolla, and 

 included stamens. Both stigmas equally developed occasionally in R. strepens 

 and R. ciliosa. Five stamens have been found in the latter. 



* Flowers in open pedunculate cvmes from upper axils and forming a terminal panicle : bracts and 

 bractlets small, linear or subulate: capsule 8-12-seeded, narrow: hairs of the seed developing 

 long spiricles when wetted. 



R. tuberosa, L. Glabrescent or minutely pubescent, a foot or two high, with somewhat 

 tuberous-tlnckened roots : leaves (2 or .3 inches long) with undulate or obscurely repand- 

 dentate margins, ovate-oblong or elliptical, and witli base cuneate-contracted or decurrent 

 into a rather long petiole: primary and secondary peduncles of the loose cyme slender: 

 calyx-lobes subulate-filiform (half inch or more long), much exceeding the bractlets, hardly 

 equalling the slender tube of the (inch and a half long blue or sometimes white) corolla, 

 which is about as long as the funnelform-campanulate throat : capsule narrowly subcla- 

 vate, 7 to 9 lines long, the stipitiform solid base mostly short but manifest. — Spec. ii. 6o-5 ; 

 Griseb. Fl. W. Ind. 452, but hardly of Desc. Ant. ii. 1. 113. R. clandeslina, L. 1. c. ( Dill. Elth._ 

 328, t. 148.) R. humilis, etc., Plum. Nov. Gen. Amer. 12, t. 2. Cryphiacanlhus Darbadensis, 

 Nees in DC. I. u. 197. Dipteracanthus mtdijlorus, Engelm. & Gray, PI. Lindh. i. 21. — River- 

 bottoms, Texas. (W. Ind., Mex., S. Am.) 



Var. OOCidentalis. Rather large and tall: inflorescence and calyx conspicuously 

 viscid-pubescent; the latter usually shorter than the tube of the m to fully 2 inch) 

 corolla : leaves from glabrate to velvety-pubescent, mostly ovate and with more abrupt or 

 even subcordate base, sometimes 6 or 7 inches long. — W. & S. Texas, Berlandier, Wright. 



5. Arizona, Rotlirock. " California " (or probably Arizona), Coulter. The two latter glabrate 

 forms. (Mex.) 



* * Flowers solitars' or 3 and cvmulose on an axillary peduncle as long as the leaf: bracts foli- 

 aceous: seeds and 'capsule of the succeeding: stems branching. 



-R. pedunculata, T6rr. Slightly puberulent, 2 feet high, with spreading branches : 

 leaves ovate-oblong, acute, short-petioled (Ii to 3 inches long) r peduncles spreading, 

 slender, 1 or 2 inches long, bearing a pair of bracts similar to the leaves (half inch or more 

 long) and equalling the calyx and capsule of the single flower, or shorter than the similarly 

 2-bracteolate pedicels when they are developed : calyx-lobes subulate-filiform, pubescent, 

 about the length of the narrow tube of the corolla : throat of the latter dilated-f unnel- 



