This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
A. Flowers white; throat yellow inside. boliviensis, Hook. Plant everywhere glabrous: stems slender: leaves petioled, 2-3 1/2 in. long, oblong, acuminate, acute at base, bright green and glossy above, pale beneath; stipules none: racemes axillary, 3-4-flowered; peduncles much shorter than the leaves, about as long as petioles and pedicels; bracts minute at the base of the twisted pedicels; calyx - lobes ovate, acuminate, 3 lines long; corolla almost salver - shaped, tube and throat slender and cylindrical, the former 1/2in. long, the latter twice as long and half as broad again; limb 1 1/2 in. across; lobes broadly ovate, more acuminate than in D. atro-purpurea. Bolivia. B. M. 5783. Gn. 44: 140. Gng. 7:342.
aa. Flowers dark purple.
(D. Marie Henriettae, Hort.). Fig. 1274. Glabrous: leaves ovate-acute, about 2 in. long, acute at the very base: racemes axillary, 2-flowered; peduncles a little longer than the leaves; pedicels twisted, bracted; calyx-lobes lanceolate-acuminate, a little shorter than the pedicel, and a third as long as the cylindrical part of the corolla (of which the tube is about 2 in. long); corolla dark purple inside and out, tube funnel-shaped above the middle; lobes triangular, wavy, spreading, shorter than the dilated part of the tube. Brazil. B.R. 29:27 (as Echites). Gn. 44:488. I.H. 42:33. Gt. 43, p. 548. variety Clarkei, Hort. Leaves rather small: flower deep crimson shaded velvet-black, about 2 1/2 in. across, the tube paler. Gn. W. 8:661. - D. atropurpurea is a handsome species, but considered to be a shy bloomer.
aaa. Flowers rose; throat deep rose or purple within, whitish outside. splendens, DC. (Echites splendens, Hook.). Fig. 1275. stem glabrous, the branches terete: leaves subsessile, 4-8 in. long, elliptic-acuminate, cordate at the base, wavy, pubescent, especially beneath, veins elevated, numerous: racemes axillary, longer than the leaves, 4-6-flowered; calyx-lobes red-tipped, awl-shaped, as long as the cylindrical part of the corolla-tube, which is half the length of the funnel-shaped portion; limb flat, 4 in. across, the lobes rotund, subacute, almost as long as the tube; corolla-tube I 1/2 in- long, white outside, lobes rosy, throat deeper, almost purple. Brazil. B.M. 3976. F.S. 1:34 shows a yellow-throated form. variety profusa, Rod. (D. profusa, Hort.), has larger and brighter rosy flowers, lined with yellow inside, the outside of the tube rosy except at the base, which is yellow. J.H. III. 57:277. I.H. 30:491 - Intro, by B. S. Williams. D. amabilis, Hort., is said to be a hybrid of D. crassinoda and D. splendens. Leaves short-stalked, oblong, acute: flowers rosy crimson, 4-5 in. across; corolla-lobes very round and stiff.
Gn. 51, p. 227. G. 12:89; 14:461. I.H. 27:396, shows a 12-flowered raceme with exceptionally bright red flowers
Fig. 1275. Dipladenia splendens. (X 1/4i) aaaa. Flowers salmon-colored; throat yellow inside and out.
Hook. Glabrous erect bush, not a vine: branches numerous, swollen at the joints: leaves ovate-oblong, obtuse at the base, suddenly narrowed at the apex into a narrow point 3/4in. long: peduncles long, drooping, flexuose; racemes axillary, 4-6-flowered; calyx-segments awl-shaped; corolla dull yellow outside, deeper and brighter yellow within; tube cylindrical in lower third, then swelling into an almost bell-shaped throat; lobes of the limb salmon inclined to purple, acute. Brazil. B.M. 4414. P.M. 16:66. F.S. 5:425.
D. amaena, Moore. Free-flowering, with good foliage: leaves oblong-acuminate: flowers pink tinted with rose; corolla-lobes rounded and not reflexed. Of garden origin (D. splendens XD. amabilis); offered abroad. F. 1868:73. G.6:391; 11:43. - D. Brearleyana, Hort. Leaves oblong, acute, dark green: flowers pink at first, changing to rich crimson, very large. Gn. 51, p. 226. F.W. 1875:161. G. 8:92; 12:703. Probably a form of Odontadenia speciosa. - D. carissima, Hort. Flowers very large (about 5 in. diam.), delicate pink lined with bright rose. Garden origin. G.Z. 27, p. 49. - D. crassinoda, DC. Glabrous: stem much branched, with many nodes: leaves lanceolate, acute or almost acuminate, acute at the base, shining and leathery on both sides: racemes axillary, about 6-flowered; calyx-lobes lanceolate, acuminate, a little shorter than the cylindrical part of the corolla-tube, 2 or 3 times shorter than the pedicel; corolla-tube bell-shaped above the middle; lobes obovate-orbicular. Brazil. The above is the original description by De Candolle, who adds that the leaves are 3-3 1/2 in. long, 3/4-l in. wide; petiole 2-3 lines long: stipules inter-petiolar, with 4 short cuspidate teeth.
The plant pictured in B.R. 30:64 was renamed D. Lindleyi by Lemaire chiefly for its pilose stem and stellate-lobed stipules. Later authorities refer B.R. 30:64 to D. Martiana. F.S. 22:2310 may be the same plant as B.R. 30:64, but with variable leaves and stipules. The plant was prized for its delicate colors, being white at first, then shot with soft rose like a flame tulip, and finally a deep rose. Only 1 flower in a raceme was open at a time, and each lasted 8 or 9 days; throat orange inside. - D. examia, Hemsl. Very slender, twining, nearly glabrous, the stem rose-red: leaves opposite, very short-stalked, 1-1 1/2in. long, orbicular-ovate to elliptic: flowers 6-8 in a cyme, 2 1/2-3 in. across, rose-colored, the tube nearly 2 in. long, corolla-lobes orbicular and obtusely cuspidate. Probably Brazil. B.M.7720. - D.flava, Hook. Flowers size and color of common yellow allamanda; climbing: leaves opposite, short-stalked, ovate to elliptic: flowers 4-6 in a lax cyme, yellow, the tube very hairy on the outside and suddenly enlarged above. Colombia. B.M. 4702. J.F. 4:373. See Urechites, to which this is properly referred. - D. Harrisii, Hook. = Odontadenia speciosa. - D. hybrida. Leaves large, stout, bright green: flowers flaming crimson-red. Garden form.
G. 32:647. - D.illuslris, DC. Glabrous or pubescent: leaves oblong or rotund, obtuse or nearly acute, rounded or subcordate at the base, many-nerved; stipules none; petiole short: racemes terminal, 4-8-flowered; flowers rosy, throat yellow inside, purple at the mouth; corolla-tube cylindrical to the middle, then funnel-shaped; limb 3-31/2in. across, lobes rosy, orbicular-ovate, obtuse. Brazil. F.S. 3:256. variety glabra, Muell. Arg. B.M. 7156. - D. insig-nis, Hort. Stout-growing: foliage strong: flowers rosy purple. Of garden origin. R.H. 1904, p. 419. G.Z. 16:145. - D. pastorum. Mart., variety tenuifolia, Hook. f. A very slender tuberous-rooted glabrous twining herb with very narrow ( 1/6in- or less broad) leaves 2-3 in. long, and rose-colored flowers 1 1/2 in. across and bearing a golden 5-clef t ring at the throat. Brazil. B.M. 7725. - D. Sanderi, Hemsl., has flesh-colored, flowers with throat yellow inside, and outside at the base, has smaller leaves than D. illustris, and no circle of purple at the mouth of the flower Gn. 51:226. Wllhelm Mlller.
L. H. B.†