988 



DENNST^DTIA 



DESCHAMPSIA 



glandular, giving the dried Ivs. a somewhat pleasant 

 fragrance; sori minute, on small, recurved teeth. 

 Canada to Tenn. Sometimes called hay-scented fern, 

 and boulder fern. Likes light porous soil and semi- 

 shaded places. Variable. 



Smithii, Moore. Lvs. thick, the under surface almost 

 woolly, glandular, tripinnate; lower pinna? 9-12 in. 

 long, 3-4 in. wide; sori 2-8 to each segm. Philippines. 



dissecta, Moore. From the W. Indies, often 6-7 ft. 

 high, with broad (2-4 ft.) Ivs. Sometimes seen in cult, 

 and is well worth a place in the trade. 



L. M. UNDERWOOD. 



DENT ARIA (Latin, dens, tooth; referring to the 

 toothed rootstocks). Crudferae. TOOTHWORT. Small 

 early-flowering herbs, sometimes offered by dealers in 

 native plants. 



Hardy herbaceous perennials, usu- 

 ally with pleasant-tasting rootstocks, 

 2 or 3 Ivs., mostly with 3 parts, and 

 corymbs or racemes of large white or 

 purplish fls. in spring: sts. mostly 

 unbranched and not leafy below: Ivs. 

 palmately 3-divided or laciniate: petals 

 surpassing the sepals; stamens 6; style 

 slender: fr. a very narrow flat silique 

 dehiscent from the base. Probably 20 

 species in Eu., Asia and in N. Amer. 

 The European and E. American species 

 are readily told from Cardamine by 

 habit and many obvious differ- 

 ences, but the W. American 

 representatives of the 2 genera 

 converge so that some botan- 

 ists have merged Dentaria into 

 Cardamine. (See E. L. Greene, 

 Pittonia, 3:117-124.) 



Several species are culti- 

 vated in Old World rockeries. 

 They are of easy culture in 

 light rich soil, and moist shady 

 positions. Usually propagated 

 by division, as seeds are not 

 abundant. 



A. Rootstock continuous, not 

 tuberous. 



diphylla, Michx. PEPPER- 

 ROOT. Fig. 1241. Eight to 16 

 in.: rootstock several inches 

 long, often branched, strongly 

 toothed at the many nodes: 

 st.-lvs. 2, similar to the root- 

 Ivs., close together; segms. 3, 

 ovate or oblong-ovate, coarsely 

 crenate, the teeth abruptly 

 acute: petals white inside, pale purple or pinkish out- 

 side. Nova Scotia to S. C., west to Minn, and Ky. 

 B.M. 1465. Rootstocks 5-10 in. long, crisp, tasting 

 like water-cress. Pretty spring fl. 



1241. Dentaria diphylla. ( X 1 A) 



AA. Rootstock tuberous or jointed. 

 B. Lvs. deeply 3-parted, but not into distinct Ifts. 



laciniata, Muhl. Eight to 16 in.: the st. pubescent 

 above: tubers deep: st.-lvs. 3, with lateral segms. 

 often 2-lobed, all oblong to linear, more or less sharply 

 toothed: petals purplish to white. Que. to Minn., south 

 to Fla. and La. Var. Integra, Fern., has the lateral 

 segms. entire or nearly so. D. anomala, Eames, is per- 

 haps a hybrid with D. diphylla; Conn. 



macrocarpa, Nutt. (C. gemmata, Greene). St. sim- 

 ple, 4-15 in.: Ivs. 1-3, palmately or pinnately 3-5- 

 parted, or divided; segms. linear to oblong, entire: 

 fls. purple or rose: tubers with joints about 1 in. long. 

 N. Calif, to Brit. Col. 



BB. Lvs. of st. cut into 3 distinct Ifts. (except sometimes 



in D. calif ornica) . 



tenella, Pursh. Six to 12 in.: tubers small, irregular: 

 basal Ivs. simple and round-cordate, crenate or sinuate; 

 st.-lvs. 1 or 2, nearly sessile, sometimes bulbiferous; 

 Ifts. linear-oblong or linear, obtuse, entire: petals rose. 

 Ore., Wash. 



calif ornica, Nutt. Tubers mostly small: st. ^-2 ft. 

 high: Ivs. very variable; st.-lvs. 2-4, mostly short- 

 petiolate, and above the middle of the st. with 3-5 

 Ifts., rarely simple or lobed; Ifts. mostly short-petio- 

 lulate, ovate to lanceolate or linear, entire or toothed: 

 petals white or rose. Mountains and streams of Calif, 

 and Ore. 



maxima, Nutt. Ten to 16 in.: tubers near the sur- 

 face, jointed, strongly tubercled: st.-lvs. 2 or 3, usually 

 alternate; Ifts. ovate or oblong -ovate, 

 coarsely toothed and somewhat cleft or 

 lobed, with petiolules: fls. white or purple- 

 tinged. Maine to Mich, and Pa. 



L. H. B.f 

 DEODAR: Cedrus Deodara. 



DEPARIA (Greek, depas, a beaker or 

 chalice; referring to the form of the invo- 

 lucre). Polypodiacese. A small genus of 

 Hawaiian and South American ferns 

 related to Dennstsedtia, rarely seen in 

 cultivation in America. The sori are mar- 

 ginal and usually on stalked projections 

 from the margin of the leaf. 



DERRIS (Greek, a leather covering}. 

 Syn. Deguelia. Leguminosse. Tropical, tall 

 woody climbers (sometimes trees), one of 

 which has been offered in S. 

 Calif., but is now apparently 

 out of cult, there. Lvs. alter- 

 nate; Ifts. opposite, the odd 

 one distant; stipules none: fls. 

 violet, purple or white, never 

 yellow, in racemes or panicles 

 or fascicles, papilionaceous, 

 standard broad and rounded; 

 wings oblique: pod indehiscent; 

 1- to several-seeded. About 

 40 species, of little horticultural 

 significance. 



scandens, Benth. Climbing: 

 Ifts. 9-18, 1-2 in. long, oblong, 

 obtuse, or acute, glabrous or 

 minutely pilose beneath: fls. 

 pale rose, in very long racemes: 

 pod long, lanceolate, acute at 

 both ends, narrowly winged at 

 the base; ovules 6-8. S. Asia 

 and Indian Archipelago to Austral. It has been offered 

 in this country, but has not been successfully cult. 



D. alborubra, Hemsl., from China, has been flowered at Kew in 

 the palm house "where it covered some square yards of the roof:" 

 fls. white, fragrant, with red calyx, in long panicles: Ifts. coria- 

 ceous, glabrous, ovate-oblong: a climbing evergreen shrub: once 

 confused with D. Fordii, Oliver. B.M. 8008. L H B 



DESCHAMPSIA (for Deslongchamps, a French 

 botanist, 1774-1849). Graminese. Tufted perennials 

 with shining spikelets in narrow or loose panicles, some- 

 times grown for dry bouquets. 



Spikelets mostly 2-fld., with a hairy prolongation 

 of the rachilla; glumes about as long as the florets; 

 lemmas toothed, bearing a dorsal awn. Species about 

 20, in the cooler regions of the northern hemisphere. 



caespitosa, Beauv. (Aira csespitosa, Linn.). TUFTED 

 HAIR-GRASS. HASSOCK-GRASS. Growing in tufts 1-3 

 ft.: blades firm, narrow: panicle open, the branches 

 slender. G.M. 54:916. Common in N. U. S., extending 



