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.
(Lembotropis nigricans, Griseb.). Shrub, 2-4 ft., with erect, appressed-pubescent branches: leaves long-petioled; leaflets obovate or oblong-obovate, glabrous above, appressed-pubescent beneath, 1/3-1 in. long: racemes very long and slender, 3-8 in. long. June, July. Germany, N. Italy, Hungary. L.B.C. 6:570. B.R. 10:802. B.M. 8479. R.B. 26:3. variety elongatus, Borkh. (variety longespicatus, Hort.). Blooming again in fall at the top of the elongated fruiting racemes. R.H. 1891, p. 149 (as variety Carlieri).
cc. Foliage persistent: branches grooved. (Teline.)
D. Leaves distinctly petioled, obovate or obovate-oblong.
E. Racemes nearly capitate, 3-9-flowered, at the end of short lateral branchlets.
(C. cdndicans, DC. Genista candicans, Linn.). Shrub, to 10 ft.: branches villous-pubescent when young: leaves short-petioled, usually glabrous above, pubescent beneath; leaflets obovate or obovate-oblong, mucronulate, 1/3-3/4in- long: racemes 3-9-flowered, short, leafy at the base; flowers fragrant, bright yellow: pod rufous-villous. May, June. Medit. region, Canary Isls. W.D.B. 1:80 (not good).
ee. Racemes longer, 6- to many-flowered, secund, terminal and lateral.
f. Petioles 1/3in. long or shorter; leaflets usually obovate, less than 1/2in. long.
(Genista canariensis, Linn.). Genista of florists. Fig. 1201. Much-branched shrub, to 6 ft., with villous-pubescent branches: leaflets cuneate, obovate or oblong-obovate, rounded at the apex, pubescent on both sides, 1/4-1/2in. long: racemes usually many-flowered, dense and rather short; flowers fragrant, bright yellow. May-July. Canary Isls. A.F. 6:802. R.B. 26:229. variety ramosissimus, Briquet (C. ramosissi-mus, Poir. C. Attleydnus, Hort.). leaflets very small, glabrous above: racemes short, but numerous. L.B.C. 13:1201. B.R. 3:217.
Fig. 1201. Cytisus canariensis.
(Genista formosa, Hort.). Fig. 1202. Shrub, to 6 ft.: branches pubescent: leaves rather long-petioled; leaflets oblong-obovate, mucronulate, 1/3-3/4in. long, silky pubescent on both sides: racemes elongated, many-flowered, secund and rather loose, 2-4 in. long. Probably of garden origin and hybrid between C. canariensis and C. maderensis variety magni-foliosus. A. F. 6:802; 13:1136. F-E. 9:431. - Better florists' plant than the last; much grown as a pot-plant and forced for early spring and Easter. variety Everestianus, Rehd. Flowers of a deeper shade of yellow, very free-flowering. R.H. 1873:390.
Fig. 1202. Cytisus racemosus. (X 1/2)
ff. Petioles 1/2in. long or longer; Ifts. oblong-obovate, about 1/2n. long or longer.
(Teline maderensis, Webb). Shrub or small tree, to 20 ft.: leaves slender-petioled, crowded; leaflets oblong-obovate, silky pubescent on both sides, or smooth above, acute or acutish, 1/3-3/4in. long: racemes 6-12-fid., rather short, fulvous or silky pubescent; flowers bright yellow, slightly fragrant: pod 5-7-seeded. May, June. Madera. variety magnifoli-dsus, Briquet (Teline stenopelala, Webb. C. steno-petalus, Christ. C. racemosus, Marnock). Leaves larger, 1/2- 1 1/2 in. long: racemes elongated, 10-20-flowered Madera. Marnock, Floricult. Mag. 2:19. B.R. 26:23 (as Gemsta bracteolata). Webb & Berthelot, Phytogr. Canar. 45. - Sometimes cultivated as C. splendens, but less desirable as a greenhouse plant than the two preceding species.
dd. Leaves nearly sessile, linear or linear-lanceolate.
Shrub, to 3 ft., with erect, ap-pressed-silky tomentose branches: leaflets linear or linear-lanceolate, acute, revolute at the margin, nearly glabrous and shining above, silvery pubescent beneath, l/2-1 in. long: racemes short and compact; flowers bright yellow: pod torulose. April-June. Spain, N. Africa, Canary Isls. B.M. 442.
C. Adamii, Poir.=Laburnum Adamii. - C. alpinus, Mill.= Laburnum alpinum. - C. austriacus, Linn. Allied to . C. supinus. leaflets narrow, oblanceolate, silky pubescent on both sides: flowers yellow; calyx densely villous. S.E. Eu., Caucasus. - C. Beanii, Nichols. (C. Ardoinii X C. purgans). Low shrub with golden yellow flowers, and narrow mostly simple leaves G. 30:207. - C. biflorus, L'Her. =C. ratisbonensis. - C. cantabricus, Willd. Allied to C. scoparius, but prostrate, with silky leaves and large bright yellow flowers: pod villous. May. Spain. - C. congestus, Ball (Teline congesta, Webb). Allied to C. linifolius. Densely villous-tomentose, small-lvd.: leaves short-petioled: racemes short. Teneriffa. - C. Dallimorei, Rolfe (C. multi-florus X C. scoparius variety Andreanus). Upright shrub with pale purple flowers G.C. III. 51:198. Gn. 74, p. 291. G.M.55:11. B.M. 8482. There are forms with sulfur-yellow and one with orange-yellow flowers - C. elongato-purpureus, Hort.=C. versicolor. - -C. elongatus, Waldst. & Kit.=C. ratisbonensis variety elongatus. - C. emeriflorus, Reichb. (C. glabrescens, Sartor, not Schrank). Allied to C. Ardoini: Sparingly appressed-pubescent: branchlets angled: flowers yellow: pod glabrous. N. Italy. G.W. 15, p. 557. - C. fragrans. Lam. Allied to C. filipes.
Petioles short: leaflets densely pubescent: flowers fragrant, white. Spring. Teneriffa. J.H. III. 50:448. - C. glabrescens. Sartor., not Schrank=C. emeriflorus. - C. handsworthensis, Paul & Sons. "A white-flowered plant suitable for the rockery."-C. Hille-brandtii. Briquet (Genista Hillebrandtii, Christ). A suffruticose species, with long, slender hairy stems and trifoliate hairy leaves Canary Isls. - C. incarnatus, Hort. = C. versicolor. - C. Laburnum, Linn.= Laburnum vulgare. - C. nubigenus, Link=C. fragrans. - C. purgans, Willd. Shrub, to 3 ft., appressed-pubescent: branches striped: leaves 1-3-foliolate, oblong or linear-lanceolate: flowers axillary, yellow, fragrant: pod glabrous. May-July. Spain, S. France. - C. ramentaceus, Sieb.=Petteria ramentacea. - C. ratisbonensis, Schaeff: Allied to C. hirsutus. To 3 ft.: branches slender, appressed-pubescent: leaflets glabrous above, silky beneath: flowers 1-2, yellow; calyx with appressed, yellowish, silky hairs. April-June. M. Eu., W. Asia. variety elongatus, Koch. More erect: flowers larger, 3-5; calyx with somewhat spreading hairs. B.R. 4:308 (as C. biflorus). - C. sessilifolius, Linn. Allied to C. nigricans.
Quite glabrous: leaves nearly sessile, with roundish-obovate leaflets: racemes short, 4-11-flowered May, June. S. Eu. B.M. 255. - C. Spachidnus,Kuntze (Genista Spachiana, Webb). Closely related to C. canariensis. Taller: leaflets obovate, acuminate: racemes somewhat elongated. Canary Isls. B.M. 4195. - C. triflorus, L'Her. Similar to C. hirsutus. Flowers long-pedicelled, yellow; calyx-tube short, not tubular. April, May. S. Eu., N. Africa Tender. F.C. 3:102. - C. versicolor, Dipp. (C. hirsutus X C. purpu-reus). Low shrub, with sparingly villous leaves: flowers yellowish white and pale purple. Sometimes cultivated as C. incarnatus. - C. Wildenii, Vis.=Petteria ramentacea. Alfred Rehder.