COLLETIA 



COLOCASIA 



829 



the nodes, spicate-glomerate; calyx top-shaped, the 

 lobes spreading. Peru, Chile. L.B.C. 19:1830. 

 Reported as cult, in Calif. L. H. B. 



COLLIGUAYA (Chilean name). Euphorbiacese. Small 

 trees of the Chilean region, scarcely in cult., although 

 the fragrant wood of some species is used. Seeds of 

 this and related genera which have springing move- 

 ments, due to contained insect larvae, are sometimes 

 known as "jumping beans." Juice milky: fls. monoe- 

 cious, apetalous; calyx imbricate or none in staminate 

 fls.; stamens 1-5; ovary 2-4-celled, cells 1-ovuled. 

 The following may be expected in botanical collec- 

 tions, although probably not in the trade: C. odorifera, 

 Molina. Lvs. serrate, ovate to oblong. C. brasiliensis, 

 Klotzsch. Lvs. serrulate, linear-lanceolate. C. integer- 

 rima, Gill. & Hook. Lvs. linear, entire. 



J. B. S. NORTON. 



COLLINSIA (after Zaccheus Collins, American phil- 

 anthropist and promoter of science, Philadelphia, 1764- 

 1831). Scrophularidcese. Hardy flower-garden annuals 

 mostly from California and western North America. 



Leaves simple, verticillate in 3's, or opposite: fls. 

 in the axils, solitary or in whorls, racemose in some 

 species; calyx bell-shaped; corolla deeply bi-labiate; 

 stamens 4, the fifth rudimentary and glandular. About 

 25 species. They are not far removed botanically from 

 Pentstemon and Chelone. From the former, the genus 

 differs in having the fifth sterile stamen reduced to a 

 mere gland. 



The collinsias are free-flowering and of the easiest 

 culture. They may be sown outdoors in the fall in wel- 

 drained soil, and will bloom earlier than if sown in 

 spring. Their flowers borne in 

 midsummer range in color 

 from white through lilac and 

 rose to violet, with clear, bright 

 blue also, at least on one lip of 

 the flower. There is no yellow. 



A. Fl.-stalks very short, giving 

 the clusters a dense ap- 

 pearance. 

 B. Corolla strongly declined; 



throat as wide as long. 

 bicolor, Benth. Fig. 1032. 

 Height 1-2 ft. : hairy, glabrous, 

 or sticky : sts. weak and bend- 

 ing: Ivs. more or less toothed, 

 and oblong or lanceolate, ses- 

 sile, finely toothed, opposite or 

 in 3's: fls. typically purple and 

 white, with 5 or 6 well-marked 

 color varieties. Var. alba, Hort. 

 (Fig. 1033), has pure white 

 fls., or the lower lip greenish 

 or yellowish. Var. multicolor, 

 Voss (C. multicolor, Lindl. & 

 Paxt.), has variegated fls., the 

 same fl. being white, lilac, rose 

 or violet on either lip or both. 

 Var. multicolor marmorata, 

 has the lower lip white, suf- 

 fused lilac, and upper lip light 

 lilac, spotted and striped car- 

 mine. Calif., below 2,000 ft. 

 B.M. 3488. P.M. 3:195. B.R. 

 1734. This is the most widely 

 distributed and variable spe- 

 cies, and the one on which the genus was founded. 

 Calif., mostly in moist ground. 



BB. Corolla less strongly declined; throat much longer 



than broad. 



bartsisefdlia, Benth. Height \Y 2 ft., the st. usually 

 stiff and simple: sticky and somewhat glandular, rarely 



hairy: Ivs. from ovate-oblong to linear: fl. -whorls 2-5, 

 purplish or whitish: seeds not wrinkled. Calif. 



AA. Fl.-stalks 



. long or more, giving the clusters 

 a looser look. 



1032. Collinsia bicolor. 



verna, Nutt. Height about 6 in. : Ivs. ovate or oblong, 

 or the lowest rounded and slender-stalked, and the up- 

 per ovate-lanceolate and partly 

 clasping: whorls about 6-fld.; fl.- 

 stalks longer than the fls.; throat 

 of the corolla as long as the calyx- 

 lobes; lower lip bright blue; upper 

 lip white or purplish : seeds thick, 

 not flattened, oblong, arched. 

 Moist woods, W. N. Y. and Pa. 

 to Wis. and Ky. B.M. 4927. 



grandifldra, Douglas. Height 

 4-12 in.: Ivs. thickish, the lowest 

 roundish and stalked: whorls 3- 

 9-fld.; fl.-stalks about as long as 

 the fls.; lower lip deep blue or 

 violet; upper lip white or purple; 

 throat of the corolla sac-like, as 

 broad as long, or as long as the 

 upper lip: seeds roundish, smooth. 

 Shady hills of Calif. B.R. 1107. 

 WILHELM MILLER. 



N. TAYLOR.f 



1033. Collinsia bicolor 



COLLINSONIA (after Peter var. alba. ( x 1 A) 

 Collinson, English botanist, cor- 

 respondent of Linnaeus and John Bartram). Labidtx. 

 HORSE-BALM. HORSE-WEED. STONE-ROOT. Native 

 perennial herbs. 



Plants of small importance horticulturally, with large, 

 odorous, ovate, serrate, mostly long-stalked Ivs., thick 

 roots, and simple or panicled, naked, terminal racemes 

 of yellow or whitish fls. Three species in E. N. Amer., 

 one of which is sometimes offered by dealers in native 

 plants, but is not especially ornamental. They are of 

 simple cult. 



canadensis, Linn. CITRONELLA. Height 2-4 ft.: Ivs. 

 4-9 in. long, broadly ovate to oblong: racemes panicled; 

 calyx in fl. 1 line, in fr. 4 or 5 lines long; corolla light 

 yellow, lemon-scented, J^in. long. Rich woods, Can- 

 ada to Wis., Kans., and south to Fla. L. jj. B. 



COLLOMIA (Greek for glue, alluding to the muci- 

 laginous character of the wetted seeds) . Polemonidcese. 

 In Asa Gray's late treatment, Collomia is included with 

 Gilia, although at first kept distinct by him (Proc. 

 Amer. Acad. Arts. & Sci. XVII, 223), and this dis- 

 position is followed here, particularly since none of 

 the species seems to be known in the trade as Collomia. 

 Engler & Prantl keep the genus distinct, however, 

 ascribing to it eighteen species from western North 

 America and Chile. Such as are cultivated will be 

 found in this Cyclopedia under Gilia. The Collomias 

 are annual, biennial and perennial. 



COLOCASIA (old Greek substantive name). Aracese. 

 Perennial herbs with cordate-peltate leaves, which are 

 often handsomely colored in cultivation ; grown under 

 glass, and one of the forms much used for planting out 

 when large-leaved tropical effects are desired; also 

 grown for the edible tubers. 



Plants tuberous or with an erect caudex: If .-blades 



Eeltate, ovate or sagittate-cordate, basal lobes rounded: 

 lade of spa the 2-5 times longer than tube; spadix 

 shorter than spathe, terminating in a club-shaped or 

 subulate appendage destitute of stamens. Differs from 

 Alocasia and Caladium in floral characters Species 5. 

 Tropics. 



Colocasia includes the plants known as Caladium 

 esculentum, which are much grown for subtropical bed- 

 ding. C. odorata (which is an Alocasia) has very large, 



