228 BROOM-RAPE FAMILY. 



6. MARTYNIA, UNICORN-PLANT. (Named by Linnaeus for Prof. 

 Martyn.) Clammy-pubescent and heavy-scented rank herbs, with long- 

 petioled rounded and obliquely heart-shaped wavy-margined leaves, and large 

 flowers, in summer. 



M. probOSCidea, COMMON U. Wild S. W., and cult, in gardens; 

 coarse, with nearly entire leaves, large corolla whitish with some purple and 

 yellow spots, and long-beaked fruit. 



M. fragrans, SWEET-SCENTED U. Cult, from Mexico ; less coarse and 

 clammy, with somewhat 3-lobed or sinuate-toothed leaves, and showy violet- 

 purple vanilla-scented flowers. 



74. GESNERIACE-ffi, GESNERIA FAMILY. 



Tropical plants, with 2-lipped or somewhat irregular corollas, 

 didynamous stamens, a one-celled ovary with two parietal many- 

 seeded placentae, therefore botanically like the next family ; but 

 with green herbage, and not parasitic, and the common cultivated 

 species have the tube of the calyx coherent at least with the base 

 of the ovary. Many, and some very showy, plants of this order 

 are in choice conservatories ; the commonest are the following. 



Gloxinia speci6sa. An almost stemless herb, with ovate and crenately 

 toothed leaves and 1 -flowered scape-like peduncles ; the deflexed corolla 2' long, 

 ventricose, between bell-shaped and funnel-form, gibbous, with a short and 

 spreading somewhat unequal 5-lobed border, violet with a deeper-colored throat, 

 in one variety white. ^ 



Gesneria zebrina. Stem tall, leafy ; leaves petioled, cordate, velvety, 

 purple-mottled ; a terminal raceme of showy flowers nodding on erect pedicels ; 

 corolla tubular-ventricose, with a small 5-lobed and somewhat 2-lipped border, 

 glandular, scarlet, with the under side and inside yellow and dark-spotted. 

 There are several other species, y. 



Achimenes longifldra. Stem leafy ; flowers in the axils of oblong or 

 ovate hairy leaves, which they exceed ; tube of the obliquely salver-shaped 

 corolla over an inch long, narrow, the very flat 5-lobed limb 2' or more broad, 

 violet-colored above, also a white variety. Propagates by scaly bulblets from 

 the root. ^ 



75. OROBANCHACE^E, BROOM-RAPE FAMILY. 



Low, root-parasitic perennials, destitute of green herbage, and 

 with yellowish or brownish scales in place of leaves, the monopet- 

 alous corolla more or less 2-lipped or irregular, 4 didynatnous 

 stamens, and one-celled ovary and pod with the 2 or 4 parietal pla- 

 centas covered with innumerable small seeds. Ours occur in woods, 

 and mostly parasitic on the roots of trees. 



1. EPIPHEGUS. Stems slender and bushy-branching, with small and scattered 



scales and two sorts of flowers, scattered in loose spikes or racemes, with 

 minute bracts. Upper flowers conspicuous, but seldom ripening fruit, with 

 tubular 4-toothed corolla, and long filaments and style ; lower flowers small 

 and short, seldom opening, but fertilized in the bud. 



2. CONOPHOLIS. Stems thick, covered with firm overlapping scales, each of 



the upper ones with a flower in its axil, forming a spike. Calyx 4- 6-toothed, 

 and split down on the lower side. Corolla short, strongly 2-lipped; upper 

 lip arched and notched; lower one spreading and 3-cleft. Stamens pro- 

 truding. 



3. APHYLLON. Stems are chiefly slender 1-flowered scapes from a scaly 



mostly subterranean base. Calyx 5-cleft. Corolla with a long curved 

 tube, and a spreading slightly 2-lipped or irregular 5-lobed border; the lobes 

 all nearly alike. Stamens included in the tube. 



