HEUCHERA 



741 



C. B.B. 2: 179. -"Evergreen .foliage marbled 

 with bronzy red."— Woolxori. 



DD. CaUjx promiHently oblique. 



hispida, Pursh. Height 2-4 ft. Woods, Va. 

 to Idaho. B.B. 2:1B0. 



cc. Inflorescence a spike. 



cylindrica, Dougl. Height 10-24 

 in. Yellowstone Park westward. 

 B.R. 23:1924. 



BB. Scapes not Jiairy. 

 r. Inflorescence a loose panicle. 



parvifdlia, Nutt. Height X-2 ft. New 

 Mex. to Jlont. 



t'C. Inflorescence denser, spicate. 



bracte^ta, Ser. Height 3-6 in. Colo. 



AA. Stamens and styles much exserted, 



at least at first. 



B. Length of calyx S-5 lines. 



lub^scens, Torr. Height 8-15 in. : 

 scape usually leafless, glabrous or some- 

 what scabrous : margin of Ivs. ciliate. 

 New Mex. to Nev. 



BB. Length of calyx 1%-S lines. 



Americana, Linn. Alum Root. Height 

 2-3 ft. : scape leafless or with a few smaF " 

 Ivs., more or less glandular-hirsute. Dry 

 or rocky woods, Ont. to La. and Minn. 

 B.B. 2:179. R. H. 1898, p. 431. -"Has 

 mottled foliage."— GJ//eW. 



BEB. Length of calyx l-PA lines. 



c. Scape villous, i. e., densely covered 



with long, soft hairs. 



villdsa, Michx. Height 

 1-3 ft.; scape mostly 

 leafless. Rocky places, 

 Va. to Ga. and Tenn. 

 B.B. 2:179. 



CO. Scape thinly covered with minute 

 glandular hairs. 



micrdntha, Dougl. Height 1-2 ft. Calif. 

 B.R. 15:1302. R.H. 1898, p. 431. 



The following names are seen in trade cat- 

 alogues but not in Index Kewensis. H. pur- 

 purdscens was advertised 1898, by H. Corre- 

 von, Geneva, Switzerland. Plants in Ameri- 

 can trade are not yet large enough for identi- 

 fication.— JJ.lF/ie^ieri was found in the South 

 some years ago, and Thomas Meehan, who 

 has not examined it closely, says it looks like 

 a form of H. Canadensis with variegated Ivs. 

 W. M. 



HfiVEA (from the Brazilian name 

 BuphorbiAceie. This includes the tree 

 that produces the Para rubber of com- 

 merce. The genus contains 11 species 

 of tall trees from Brazil and Guiana, 

 furnishing the milky juice called caout- 

 chouc: Ivs. alternate, long-stalked, the 

 3 leaflets entire, feather-veined, mem- 

 branous or leathery: fls. small, monoe- 

 cious. Important generic characters are ''^J 

 the 3 leaflets, loose panicles, 5-toothed " 

 or 5-lobed calyx, and 5-10 stamens, the 

 filaments united in a column under the 

 rudimentary ovary. The nearest ally of 

 garden value is Jatropha, in which the 

 fls. have petals, while Hevea belongs to 

 a group in which the petals are lacking. 

 This plant may possibly be cult, under 

 glass for its economic interest in a few 

 botanical collections. It was once adver- 

 tised by Reasoner Bros., Oneco, Fla. 

 The common "rubber plant," extensively 

 cult. North as a house plant, is the East 

 India Rubber Plant, Ficus elastica. 



Brasiliensls, Muell. Arg. .South Amer- 

 ican Rubber Tree. Height 60 ft. : Ifts. 

 membranous: staminate fls. with buds 

 narrowly ovoid-conical and disc small. 



urn-shaped, niany-lobed, tomentose; an- 

 thers HI, in 2 whorls: floral Ifts. 2-3 in. 

 long, elliptic-lanceolate. Brazil. 



HEXlSEA (Greek, six equal things: 

 because the attractive and bright colored 

 parts of the flower are 6, and of equal 

 size). Orchidacece. Should have been 

 written Sexisia. This includes a small 

 epiphytic plant which John Saul once 

 advertised as "bearing profuse panicles 

 of bright vermilion flowers twice a year." 

 The genus belnngs to a subtribe closely 

 related to E]iidentlrum but with different 

 pollinia. Stems terete or angled, with 

 usually 2 Ivs. at the apex of each annual 

 growth. New growths arise in the axils 

 of the Ivs., the entire stem being thus 

 made up of long, fusiform, apparently 

 superimposed pseudobulbs, with 2 Ivs. 

 at each node. Lvs. few, narrow : ra- 

 cemes terminal, the short-peduncled fur- 

 nished with overlapping, leathery scales : 

 fls. orange or purple; anthers semi-glo- 

 bose ; pollinia 4, in 1 series. 

 Four species, ranging from 

 Mexico to Guiana. 



bidentata, Lindl. Height 6-8 

 in.: stem branched, forming 

 spindle-shaped, many-grooved inter- 

 nodes: lvs. in pairs, 2-4 in. long, 

 3 lines wide, channelled, notched. 

 Panama. B.M. 7031. G.M. 37:19. 

 H. Hasselbring. 



HIBISCUS (old Latin name). Mal- 

 vAcew. Maksh Mallow. Rose Mal- 

 low. A polymorphous genus, allied 

 to Gossypium, Abutilon, Altbsea and 

 Malva, the species widely distributed 

 in temperate and tropical countries. 

 Herbs or shrubs, or even trees, with 

 lvs. palraately veined or parted. 

 Parts of the fl. in 5's; calyx gamo- 

 sepalous, 5-tootbed or 5-cIeft, sub- 

 tended by an involucel of narrow 

 bracts; corolla usually campanulate, 

 showy, of 5 distinct petals; stamens 

 united into a 5 -toothed column: ovary 

 5-loculed, bearing 5 styles : fr. a dry, 

 more or less dehiscent capsule. Be- 

 tween 150 and 200 species. Horticul- 

 turally, there are four general groups 

 of Hibiscus — the anniuUs, the per- 

 ennial border herbs, the hardy 

 shrubs, and the glasshouse shrubs. 

 The culture and treatment vary with 

 these groups. 



INDEX. 



1054. Hibiscus vesicarius- 

 H. Africanus of gardens. 



(XK.) 



