658 



GESNERIACE^E. XXI. STREPTOCARPUS. XXII. DIDYMOCARPUS. 



Cult. For culture and propagation see Rytidophyllum, 

 p. 650. 



Subtribe II. 



DIDYMOCA'RPEjE (the plants contained in this subtribe 

 agree with the genus Didymocarpus, in the siliquose capsules 

 and naked seeds.) All as in Trichosporece, except the seeds, 

 which are not furnished with any hair at either end. 



XXI. STREPTOCA'RPUS (from arpnrog, slreplos, twist- 

 ed ; and Kapxos, carpos, a fruit ; the capsule is spirally twisted.) 

 (fig. 72. f.) Lindl. bot. reg. 



1173. Didymocarpus species, FIG. 72. 



Hook. 



LIN. SYST. Didndria, Mono- 

 gynia. Calyx 5-parted (fig. 72. 

 a.) Corolla tubularly funnel- 

 shaped ; throat ventricose ; limb 

 oblique, 5-lobed, nearly equal. 

 Stamens 4, the 2 anterior ones 

 fertile, and the 2 sterile ones 

 tubercle-formed (f. 72. d.) ; 

 anthers glabrous, connate (f. 

 72. c.) : cells divaricate. Style 

 compressed ; stigma bilabiately 

 dilated : lips reniform. Capsule 

 siliquose, spirally twisted ; pla- 

 centas bilamellate, conniving in 

 the middle ; margins revolute, 

 seminiferous. Seeds numerous, 

 minute, glabrous. A tufted, 



stemless herb. Leaves wrinkled, flat on the ground. Peduncles 

 radical, 1 -flowered, bibracteate above the middle. Corollas 

 pale blue. 



1 S. RE'XII (Lindl. 1. c.) y. . S. Native of South Africa, 

 in the lands of Mr. G. Rex, at the Knysna, where it was disco- 

 vered by Mr. Bowie. Didymocarpus Rexii, Hook. exot. fl. t. 

 227. Leaves ovate, crenated, 6-9 inches long, and 3-4 broad. 

 Peduncles on the axils of the leaves. Corolla 2 inches long, 

 pubescent. (Fig. 72.) 



Rex's Streptocarpus. Fl. Year. Clt. 1824. ? PI. \ foot. 



Cult. A light rich earth or vegetable mould is a good soil for 

 this plant ; which is readily increased by division. 



XXII. DIDYMOCA'RPUS (from Si^os, didymos, twin ; 

 and icapTroe, karpos, a fruit ; in reference to the twin capsules.) 

 Wall, ex Jack, in Lin. trans. 14. p. 32. D. Don, prod. fl. 

 nep. p. 122. 



LIN. SYST. Didynamia, Angiosptrmia. Calyx 5-cleft. Co- 

 rolla funnel-shaped, with a ventricose throat ; limb 5-lobed ; 

 upper lip the shortest. Stamens 4, rarely 5, 2 of which 

 are antheriferous, inclosed : sterile ones very short ; anthers ad- 

 nate: cells transverse. Stigma lateral, flattish, obtuse. Cap- 

 sule silique-formed, falsely 4-celled, 2-valved ; valves opening 

 elastically from the dorsal suture. Lobes of dissepiment with 

 revolute, seminiferous edges. Seeds naked, pendulous, ovate. 

 Perennial, stemless, or caulescent herbs. Roots tufted, fibrous. 

 Leaves usually cordate, crenated, wrinkled, hairy. Stems or 

 scapes erect, simple. Flowers rose-coloured or purple, involu- 

 crated, disposed in dichotomous umbels. 



^ 1. SCAPI'GER*. Stemless, scapigerous plants, with radical 

 leaves. 



1 D. MACROPHY'ILA (Wall, in litt. ex D. Don, prod. fl. nep. 



p. 122.) leaves cordate-oval, dentately serrated or crenated, vil- 

 lous above and nearly naked beneath ; scapes glabrous, much 

 shorter than the leaves ; involucra and involucels roundish, 

 quite entire, connate at the base ; calycine segments roundish. 

 If. . G. Native of Nipaul and Kamaon ; from Jurreepanee up- 

 wards, towards Mussooree, and near Simla. Royle, ill. himal. 

 t. 70. f. 2. Leaves large, usually solitary, 3-7 inches long, and 

 2j or 5 inches broad. Petioles 3-4 inches long. Scapes equal 

 in height to the petioles, rarely higher. Flowers and involu- 

 cels purple. 



Long-leaved Didymocarpus. PI. J to J foot. 



2 D. CINE'REA (D. Don, prod. fl. nepf p. 122.) leaves cor- 

 date-oval, obtuse, unequally crenated, clothed with cinereous 

 tomentum above, as well as the petioles ; scapes mealy, few- 

 flowered, shorter than the leaves ; involucra a little toothed, 

 and are, as well as the involucels, clothed with greyish tomen- 

 tum ; calycine segments ovate, acute. If.. G. Native of Ni- 

 paul. Leaves \\ to 2 inches long, about equal in length to the 

 petioles, grey on both surfaces. Scapes filiform. Flowers 

 large, purple. 



Cinereous Didymocarpus. PI. i foot. 



3 D. PLICA'TA (D. Don, 1. c.) leaves twin, nearly sessile, orbi- 

 cularly cordate, fleshy, rugosely plicate above, silky white, and 

 lacunosely veined beneath, with revolute edges ; scapes pubes- 

 cent, many-flowered. I/ . G. Native of Nipaul. Root much 

 branched, fibrous, densely tufted. Leaves an inch long. Scapes 

 5 inches high. 



Plicate-\ea\e& Didymocarpus. PI. \ foot. 



2. Caulescentes. Caulescent plants. 



4 D. VILLOSA (D. Don, 1. c. p. 123.) stem 4-leaved, very 

 villous ; leaves unequal, oval, petiolate, doubly crenated, clothed 

 with silky villi on both surfaces ; peduncles solitary, or twin, 

 many-flowered, glabrous, longer than the leaves ; calyxes 

 smooth, i;. G. Native of Nipaul. Leaves 1-2 inches long, 

 rounded at the base : radical ones none. Segments of calyx 

 very short, rounded. Corolla large, purple. 



Villous Didymocarpus. PI. \ to -J- foot. 



5 D. OBLONGA (Wall. pi. rar. asiat. 2. p. 34. t. 140. D. 

 Don, prod. fl. nep. p. 123.) 



stem furnished with 2-4 leaves 

 at top, woolly, or downy ; leaves 

 elliptic-oblong, or ovate-oblong, 

 acuminated, rather villous ; pe- 

 duncles terminal, crowded, twice 

 forked, with 2 sessile, cordate 

 sessile bracteas under each bi- 

 furcation, downy. 1. G. Na- 

 tive of Nipaul, among rocks on 

 Sheopore. Radical leaves none. 

 Leaves 2-| inches long, and be- 

 low an inch broad. Middle 

 pedicels 1 -flowered, and lateral 

 ones generally 2-flowered. Co- 

 rollas dark purple. Bracteas or 

 involucral leaves quite entire, 

 and are, as well as the calyxes, 

 coloured. (Fig. 73.) 



O6/o?j,g-leaved Didymocarpus. PI. i to 1 foot. 



6 D. AROMA'TICA (Wall, in edinb. phil. journ. 1. p. 378. pi. 

 rar. asiat. 2. p. 31. t. 141. D. Don, prod. fl. nep. 123.) stem 

 leafy, pubescent; radical leaves few, pressed to the ground, 

 ovate-cordate, obtuse, crenated, on short petioles, the two lower 

 cauline ones broad-cordate, on long petioles, coarsely and 



FIG. 73. 



