472 



DENDROPHTLAX 



DENDEOPff?LAX (Greek, groicitig on a tree). Orchi- 

 ddcew, trihf> Vrhnlnr. Epiphytes : sepals and petals 

 spreadinfr. iatn'Iliiin H-I<>h»*d, lateral lobes small, angular, 

 middle inn- witli ^incailiTii; lobes; spur long, filiform: 

 column shori ; |".lliiii;i L'. Near Phalrenopsis. The fol- 

 lowing are iiitr<Hlucfd into American horticulture: 



Lindenii, Reichb. f. Scape leafless, bearing a single 

 white tiower : sepals and petals lanceolate ; divisions 

 of midlobe of labellum lanceolate; capsule smooth. On 

 Oreodoxa Megia, and live oaks, S. Florida. 



funilis, Hort. { Oi^coclMes funilis, Lmd\. Angrwcum 

 fitndle, Lindl.). Leafless, roots numerous, fleshy: pe- 

 duncles 2-fld.: fls. white; sepals and petals oblong-lan- 

 ceolate ; labellum 3-lobed, with a long horn. Mts. of 

 Jamaica. 



DENNSTaiDTIA (e 



Oakes Ames. 



onal name). Polypodidcetp- 

 A genus of hardy or greenhouse ferns of wide distri- 

 bution, often referred to Dicksonia but belonging to a 

 different family from the antarctic or southern hemi- 

 sphere tree ferns of the latter genus. Indusiura inferior 

 cup-shaped. For culture, see Dicksonia 



punctil6bula, Moore {Dicksbnia pilosiiis- 

 cula, Willd.). Figs. 692,693. Lvs. light 

 green, from a slender, creeping rootstock, 

 1-2% ft. long, 5-9 in. wide, usually tri- 

 pinnatifld, under surface minutely glandu- 

 lar, giving the dried lvs. a somewhat pleas- 

 ant fragrance ; sori minute, on 

 small, recurved teeth. Canada to 

 Tennessee. 



^W 



-^ 



'n 



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

 woolly, glandular, tripinnate; lower pinnae 9-12 in. long, 

 3^ in. wide; sori 2-8 to each segment. Philippines. 



diss^cta, from the West Indies, often 6-7 ft. high, 

 with broad (2-4 ft.) lvs. is sometimes seen in cultivation, 

 and is well worth a place in the trade. 



L. M. Underwood. 



DENTAEIA (Latin, dens, tooth ; referring to the 

 toothed rootstocks). Cruel ferie. Toothwobt. Dealers 

 in native plants sometimes cultivate a few of these hardy 

 herbaceous perennials, which have pleasant tasting root- 

 stocks, 2 or 3 lvs., mostly with 3 leaflets, and corymbs 

 or racemes of large white or purplish fls. in spring. 

 The European and eastern American species are readily 

 told from Cardaniine by habit and many obvious differ- 

 ences, but the western American of the two genera 

 converge so that some botanists have merged Dentaria 

 into Cardamine. (See E. L. Greene, Pittonia. 3:117-124.) 

 The genus contains no arctic or alpine forms. About 9 

 species are cultivated in Old World rockeries. They are 

 of easy culture in light, rich soil and moist, shady posi- 

 tions. Usually prop, by division, as seeds are not 

 abundant. 



A. Sootstock not tuberous. 



diphylla, Michx. Pepper-root. Rootstock several 

 in. long, often branched, strongly toothed at the many 

 nodes : stem-lvs. 2, similar to the root-lvs., close to- 

 gether ; leaflets 3, ovate or oblong-ovate, coarsely cre- 



UESCHAMPSIA 



nate, the teeth abruptly acute; petals white inside, pale 



purple or pinkish outside. 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 flower. 



AA. Bootstock tuberous. 



B. Lvs. 3-parted, but not into distinct leaflets. 



c. Tubers usuully not jointed or prominently tubercled. 



laciniilta, Mubl. Tubers deep-seated; stem-lvs. 2 or 3, 



with lateral segments often 2-lobed, all broadly oblong 



to linear, more or less sharply toothed; petals pale rose 



to white. Quebec to Minn., south to Fla. and La. 



cc. Tubers with joints about 1 in. long. 



macrocArpa, Nutt. (C gemm&ta, Greene). Lvs. 1-3, 

 palmately or pinnately 3-5-parted or divided, segments 

 linear to oblong, entire : fls. purple or rose. N. Calif, 

 to B. C. 



BE. Lvs. cut into 3 distinct leaflets. 

 c. Leaflets linear, entire. 



ten^Ua, Pursh. Tubers small, irregular: stem-lvs. 1 

 or 2, nearly sessile, sometimes bulbiferous ; leaflets 

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

 Washington. 



cc. Leaflets not linear or entire. 



Califdrnioa, Nutt. Tubers mostly small : stem K-2 ft. 

 high ; lvs. very variable ; stem-lvs. 2-4, mostly short- 

 petiolate, and above the middle of the stem, with 3-5 

 leaflets, rarely simple or lobed; leaflets mostly short- 

 petiolulate, ovate to lanceolate or linear, entire or 

 toothed; petals white or rose. Mts. of Calif, and Ore. 



mAxima, Nutt. Tubers near the surface jointed, 

 strongly tubercled : stem-lvs. 2 or 3, usually alternate; 

 leaflets ovate or oblong-ovate, coarsely toothed and 

 somewhat cleft or lobed. Vt. to western N. Y. and 

 Peuna. w. M. 



DEODAE. Cedrus Deodara. 



DEPAEIA (Greek, depas, a beaker or chalice; refer- 

 ring to the form of the involucre). A small genus of 

 Hawaiian and South American ferns related to Denn- 

 stiedtia, rarely seen in cultivation in America. The 

 sori are marginal and usually on stalked projections 

 from the margin of the leaf. l. jj. itnderwood. 



S^EEIS (Greek, n leather covering). Legumindsw. 

 A genus of tropical, tall, woody climbers, one of which is 

 cult, in S. Calif. About 35 species, mostly Asian. Lvs. 

 alternate; Ifts. opposite, the odd one distant; stipules 

 none: fls. violet, purple or white, never yellow. 



8c4ndens, Benth. Climbing; Ifts. 9-13, lK-2 in. long, 

 oblong, obtuse, mutiious or retuse, glabrous or minutely 

 pilose beneath: racemes 4-G in. long, unbranched: fls. 

 purple: jiod Imit;. l:iuceolateacuteat both ends, narrowly 

 win-'liti I L' l.i ; ovules 6-8. S. Asia and Indian Ar- 

 chil" ■ I ■ - i'-'-n offered in this country, but has 

 not I" . . . I y cultivated. The above description 

 is Til 111 1 1 I : i'lM - [M ■iitii-ns contributed by Dr. Franceschi, 



DESCHAMPSIA (after Deschamps, a French bota- 

 nist). Perennial grasses with small, shining spikelets, 

 like Trisetum and Aira. The plants are usually stouter 

 and the spikelets longer than in Aira, from which it dif- 

 fers in the prolongation of the rachilla. Lvs. flat or con- 

 volute: spikelets 2- (rarely 3-) fld., in terminal, usually 

 spreading panicles : awn slender, twisted below. Spe- 

 cies about 20, inhabiting cold and temperate regions, a 

 few occurring in the high mountains of the tropics. 

 About 8 species are found in N. America. 



caespitdBa, Beauv. (A'ira caispitdsa, Linn.). Tufted 

 Hair-Grass. Hassock-Grass. A native perennial hav- 

 ing a tendency to form tufts or tussocks. Panicle 

 pyramidal or oblong, 2 in. long ; rays slender, bearing 

 spikelets above the middle ; awn variable in length.— 

 Abundant in the Rocky Mt. region, where the tufts 

 help to bind the spongy soil and prevent land-slides. 

 In England it is sometimes used by the farmers to 

 make door mats. Also used for ornament. 



