1164 



EULOPHIA 



EUPATORIUM 



scripta, Lindl. Lvs. linear, subdistichous : fls. purple 

 and yellow; sepals and petals linear-oblong; labellum 

 3-lobed, lateral lobes rotund at the apices. Madagascar. 



E. Cdlese, Rolfe. A slender-growing species with aloe-like bra. 

 E. Lubbersiana, Laurent & Th. Dur. Allied to E. maculata: Ivs. 

 dark green, marbled with white. Afr. E. nitda, Lindl. Scape about 



2 ft. tall, many-fld. ; fls. ranging from rose-purple to pink, or yellow- 

 ish green; lip nearly entire, recurved. India and China. B.M. 

 8057. E. paniculdta, Rolfe. Pseudobulbs tufted, bearing 2 strap- 

 shaped Ivs.: fls. numerous; petals and lip yellowish green dotted 

 with purple. Madagascar. E. undulata, Rolfe. Scape about 1 ft. 

 high, of slender growth; petals and lip pale green, the latter with 



3 prominent keels on the disk. Rhodesia. E. Woodfdrdii, Rolfe. 

 With tall many-fld. infl. ; fls. green with dull claret-purple lip. Old 



Calabar. GEORGE V. NASH.J 



EULOPHIELLA (a diminutive of Eulophia). Orchi- 

 ddcex. Orchids in habit resembling a small cyrtopodium. 



Flowers in many-fld. racemes; sepals and petals 

 similar, concave; lip 3-lobed, spurless; column with a 

 curved foot; pollinia 2. Species 2. They require the 

 conditions and treatment given Cyrtopodium. 



Elisabethae, Hook. Lvs. nearly 2 ft. long, plicate: 

 scape stout; raceme many-fld.; fls. about 1 J^ in. across; 

 sepals and petals white, the former marked with rose 

 on the outside; lip white with a golden disk. Mada- 

 gascar. B.M. 7387. G.C. III. 45:407. C.O.I. O.K. 6: 

 177; 20: 137. 



Peetersiana, Kranzl. Bulbs 1 ft. long: raceme dense; 

 fls. nearly 3 in. across, rose-purple; lip with a golden 

 blotch. Madagascar. G.M. 51:267. C.0. 2. O.K. 

 6: frontispiece; 20:138. 



E. H&melinii, Rolfe. Resembling E. Peetersiana in habit but 

 Ivs. narrower and fls. smaller. Madagascar. 



GEORGE V. NASH. 



EU6NYMUS: Evonymus. 



EUPATORIUM (named for an ancient king of 

 Pontus said by Pliny to have employed one of this 

 group of plants in medicine). Composite. JOE-PYE 

 WEED. THOROUGHWORT. BONESET. HEMP AGRIMONY. 

 MIST-FLOWER. Chiefly perennial herbs, a few species 

 annual, many of the tropical ones shrubby or even arbo- 

 rescent; some of them hardy border plants, others 

 grown in coolhouses as florists' plants, and others in 

 warmhouses for the attractive foliage. 



Heads rayless, mostly in dense flat-topped or rounded 

 clusters, less frequently in open panicles, the florets 

 (rarely 1-4) mostly 5 or more in each head, perfect, 

 the 2 style-branches long, threadlike or club-shaped, 

 protruding far out of the tube of the floret; involucre 

 cylindrical to hemispherical, its scales in 2 to many 

 overlapping ranks: achenes 5-angled, crowned with a 

 well-developed pappus of hair-like mostly white bris- 

 tles: Ivs. mostly opposite: fls. purple, rose-colored or 

 white, more rarely lilac or bluish violet, never yellow. 

 At least 600 species, chiefly of Mex., the W. Indies, 

 and Trpp. S. Amer. Certain species, now botanically 

 placed in Eupatorium, still appear in trade catalogues 

 and seed-lists under the names Hebeclinium and Cono- 

 clinium. Others have been confused with Ageratum. 



Of this large and varied genus relatively few species 

 have been brought into cultivation. Of these, there are 

 two classes, namely certain warm-country species 

 adapted only to glasshouse culture, and on the other 

 hand a few native North American species (as well as 

 the hemp agrimony of Europe), more or less tractable 

 in cultivation, especially as components in making up 

 mixed hardy borders. The glasshouse species are seen 

 only in the larger or amateur collections, as a rule, 

 although a few have been long in European cultiva- 

 tion. Of the hardy species, some, reputed medicinal, 

 are found in old gardens. The glasshouse species 

 demand the general treatment of Piqueria (Stevia of 

 florists) a cool or intermediate temperature and pot 

 culture. They are easy to grow, and propagate readily 

 by cuttings. They are useful for winter bloom, the 

 heads, though individually small, being aggregated in 

 showy masses. 



KEY TO THE SPECIES. 



A. Glasshouse or warm-country species. 

 B. Florets pink, purple, lilac, or violet. 

 c. Involucral scales not ending in 



hairy tails. 



D. Shape of Ivs. ovate; If. -stalks long. 

 E. Lvs. heart-shaped. 



F. Sts. covered with dense red- 

 dish wool 1. atrorubens 



FF. Sts. green. 



G. Panicle dense, terminal: 



Ivs. mucronate-toothed . . 2. megalophyl- 

 GG. Infl. lax, partly axillary: [lum 



Ivs. crenate-toothed 3. Purpusii 



EE. Lvs. pointed or blunt at base . . . 4. ianthinum 

 DD. Shape of Ivs. lanceolate or oblong; 



If.-stalks short. 



E. Lvs. alternate: heads many-fld.. 5. Lasseauxii 

 EE. Lvs. opposite: heads 5-1 2-fld... 6. serrulatum 

 cc. Involucral scales ending in hairy, 



colored tails 7. hecatanthum 



BB. Florets white or nearly so (the pappus 



sometimes colored). 



c. Lvs. leathery, lance-oblong, gla- 

 brous, entire 8. araliaefolium 



cc. Lvs. not leathery, usually somewhat 



toothed and hairy. 



D. Lf. -blade elliptic-lanceolate, de- 

 current and crisped on short 



stalk 9. micranthum 



DD. Lf. -blade round-ovate, toothed 



even to the decurrent base 10. conspicuum 



ODD. Lf. -blade not decurrent on petiole. 

 E. Plant glandular-sticky. 



F. Heads about yin. diam 11. glandulosum 



FF. Heads about y^in. diam. ... 12. probum 

 EE. Plant not glandular-sticky. 

 F. Lvs. velvety beneath: infl. 



broad rounded corymb 13. vernale 



FF. Lvs. sparingly hairy or soon 



glabrate. 



G. Shape of Ivs. round- or 

 triangular-ovate; 

 margins toothed. 

 H. Lf. -blade small, y% 



1% in. long 14. glechonophyl- 



HH. Lf. -blade larger, 2-4 [l um 



in. long 15. pazcuarense 



GG. Shape of Ivs. elliptic- 

 ovate; margins nearly or 



quite entire 16. glabratum 



GGG. Shape of Ivs. narrowly 



lanceolate 17. riparium 



AA. Hardy or border plants. 



B. Florets flesh-colored, reddish or bluish- 

 purple, 

 c. Lvs. lance-oblong, merely toothed, 



mostly whorled 18. purpureum 



cc. Lvs. deeply 8-parted, opposite 19. cannabinum 



ccc. Lvs. broadly ovate, opposite, merely 



toothed 20. coslestinum 



BB. Florets white or nearly so. 



c. Lvs. perfoliate (united around the 



st.) 21. perfoliatum 



cc. Lvs. not perfoliate. 



D. Lf. -blade lanceolate, the base nar- 

 rowed and scarcely stalked. 



