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.
(E. jacquiniaeflora, Hook.). Scarlet Plume. Fig. 1439. Small shrub with slender drooping branches: leaves long-petioled, lanceolate, bright green: cyathia in small axillary cymes, with the conspicuous appendages to the 5 involucral glands bright scarlet. Mex. B.M. 3673. R.B. 39:41. F.C. 2:55. R.H. 1905:440. Gn. 33:486; 39, p. 239; 67 p. 73. V. 2, p. 74. A.F. 16: 1551. G.M. 53:89. G. 4: 593. P.M. 4:31. Gng. 10:76. - A handsome winter - blooming plant, used for cut-flowers or for specimen plants.
Leaves small, obovate, pubescent, clustered at the end of crooked branches: flowers inconspicuous. S. Calif, and Mex. - Recently catalogued in the Calif, trade.
(Tricherostigma antisyph-ilitica, Klotzsch & Garcke). Candelillo. Slender, erect, rod-like branches 1-3 ft. high, almost leafless. Mex. - The plants yield a useful wax and are sometimes grown in collections of succulents.
aa. Glands of involucre without petal-like appendages. (Nos. 8-65) b. stem herbaceous or shrubby, not fleshy: leaves well developed, the upper colored: stipules minute: infloresence cymose. Section Poinsettia.
(E. Poinsettiana, Buist. Poinsittia pulcherrima, Graham). Poinsettia. Easter Flower. Christmas Flower. Lobster Flower. Mexican Flame-Leaf. Fig. 1440. Shrub 2-10 ft. high, branched: leaves ovate-elliptical to lanceolate, entire, sinuate toothed or lobed, or panduriform, 3-6 in. long, somewhat pubescent, the upper narrower, more entire to even linear-lanceolate and of the brightest vermilion-red: involucres 2-3 lines wide, greenish, with one large yellow gland. Nov. - Marcn. Moist, shaded parts of tropical Mex. and Cent. Amer. B.M. 3493. G.C. III. 21:125, 193. F.C. 1:33. Mn. 7, p. 67. Gn. M. 2:209. - Sometimes cut, usually used for specimen plants and in masses, often used in decorations. A gorgeous plant. variety plenissima, Hort., has the flowers, or moat of them, transformed into red bracts, giving a fuller center. G.C. II. 5: 17. Gt. 28: 182. F.M.
Fig. 1440. Euphorbia pulcherrima (X 1/5). No. 8.
Fig. 1441. Euphorbia heterophylla (X1/8-No. 9.
1876:200. variety alba, Hort., has the upper leaves white. R.H. 1913: 228. - It is not so vigorous, blooms later and requires more heat.
(E. pandurata, Hort.? E. havanensis, Willd. E. cyathophora, Murr.). Mexican Fire Plant. Hypocrite Plant. Painted Leaf.
Flre-On-The-Mountain. Annual Poinsettia. Fig.
1441. Annual, nearly glabrous, 1-3 ft. high: lvp. ovate and sinuate-toothed, or panduriform, or some of them lanceolate or linear and entire, dark green, the upper bright red at least at the base: involucres small with 1 or 2 glands. July-Sept. E. and Cent. U. S. to Peru. Mn. 2, p. 53. Gt. 39, p. 105. - Easily grown from seeds in sunny gardens and also in pots indoors. White and yellow variegated forms are in cultivation
bb. stems more or less fleshy, often cactus-like and spiny: leaves small, none or soon deciduous: infloresence few-branched or cyathia single: stipules minute or none (except in E. Fournieri). Section Euphorbium. Nos. 10-51.
c. Branches cylindrical or angled, not thorny: If. - bases not thickened and elevated as podaria: leaves alternate or crowded on the angles.
d. Joints or branches cylindrical or flat. Subsection Tirucalli.
Milk-Bush. Indian Tree Spurge. A small tree, with a dense crown of slender, cylindrical whorled branches, curving outward then erect: joints about 4 in. long, twigs 1/4- 1/2in. thick: leaves narrow, about 1 in. long, soon falling. S. Asia. - A striking plant for the succulent collection. Easy of cultivation, often grown outdoors in warm regions.
11. rhipsaloides, Lem., is a closely related African species probably not now in cultivation, but the name is in use in the trade.
Shrub or tree: trunk cylindrical, much branched; branches flat or 2-angled, 1/2in. wide, slightly toothed along the edges: leaves minute, soon deciduous. Madagascar.
dd. Joints or branches 4-5-angled from the decurrent If. - bases or comb-like rows of stipules. Subsection Goniostema (No. 13) and Subsection Pteron-eurAE (No. 14).
4-5-angled, the crowded persistent stipules forming comb-like rows on the angles: leaves large at the apex of the short thick stems; petioles and stipules red. Madagascar region. R.H. 1896, p. 226. L.B.C. 15:1477 (as E. lophogona).
A low shrub with erect, jointed branches, 1/3in. thick, the 5-6 angles formed by sharp low ridges decurrent from the If . - bases: leaves reduced, soon deciduous. Mex. (?) - Erroneously grown under the name of E. colletioides, Benth.
cc. Branches succulent with thickened elevated If. - bases (podaria).
D. Spines 1-2 on each side the If. - base. Subsection
e. Podaria (If. - bases) not united into ribs; branches nearly cylindrical: leaves well developed.
F. Bracts bright red. Class Splendentes.