996 



DEWBERRY 



DIANELLA 



fruit of medium size, round-oblong, sweet. Several 

 varieties, of which possibly Aughinbaugh and Skagit 

 Chief are the best known, are cultivated in the far 

 West. The loganberry is said to be a hybrid between 

 this species and R. Idseus, and several less well-known 

 hybrids are recorded. 



The dewberry should receive under cultivation much 

 the same treatment given the more common black- 

 berry. The culture of the two differs chiefly in the 

 dewberries requiring more care in training and must 

 usually be better protected for the winter. The plants 

 are trained on trellises of two or three wires or tied 

 to stakes, the former method giving better results, but 

 the latter being more common. The object in either 

 case is threefold, namely, to regulate the amount 

 of bearing wood, to keep the vine out of the way of the 

 cultivator and to keep the fruit off the ground. The 

 plants should be set 4 by 7 feet apart, these distances 

 varying somewhat in accordance with the variety and 



1250. Bartel dewberry. 

 (XX) 



the soil. Pruning is a simple matter, consisting of short- 

 ening back young plants to 4 or 5 feet the first season 

 to keep them from sprawling too much, cutting out 

 old canes at any time after fruiting, and heading-in 

 long shoots and laterals in early summer. From four 

 to six fruiting canes are allowed to the plant. In 

 northern climates, the vines must be laid on the ground 

 and protected in winter with straw or other material. 

 The plants thrive on a somewhat lighter soil than the 

 blackberry in fact some sorts require such a soil. 

 Varieties should be intermixed to secure cross-pollina- 

 tion and thereby insure a good set of fruits and avoid 

 the formation of nubbins. 



Of about thirty named varieties, Lucretia, Bartel, 

 Austin and Premo are the best. Of these four, Lucretia 

 is far most commonly grown, being adapted to the 

 greatest diversity of soils and is in general best suited 

 to varying environments. For history and botany, see 

 Bailey, "Evolution of our Native Fruits;" for culture, 

 see 'Card's "Bush-Fruits," and Cornell Bulletins Nos. 

 34 and 117. Consult Blackberry, Loganberry and Rubus. 

 . U. P. HEDRICK. 



DEYEUXIA: Calamagrostis. 



DIACATTLEYA (compounded of Diacrium and 

 Cattleya). Orchidacese. A genus established to include 

 hybrids between the two genera, Diacrium and Cat- 

 tleya. A hybrid between Diacrium bicornutum and 

 Cattleya Mendelii is known as Diacattleya Sanderse. 

 It was raised by Sander & Sons. The fls. are pure white, 

 the lip with a pale yellow disk and small rose markings. 

 G.C. III. 49:290. D. Cblmanix, Hort. (Diacrocdttleya 

 Colmanise is a hybrid between Diacrium bicornutum and 

 Cattleya intermedia var. nivea. G.C. III. 43:114. J.H. 

 56:167. It resembles a slender plant of Diacrium 



bicornutum: sepals and petals pure white, lip slightly 

 tinged primrose-yellow. GEORGE V. NASH. 



DIACRIUM (through and point; the sts. are sur- 

 rounded by sheaths). Orchidacese. Four Trop. Amer. 

 epiphytes, closely allied to Epidendrum, with which 

 they have been included. It differs from that genus 

 in the fact that the column and lip are not united. Fls. 

 showy, in loose racemes: Ivs. few, sheathing: pseudo- 

 bulbs slender. Cult, of Epidendrum and Cattleya. 



bicornfttum, Benth. (Epidendrum bicornutum, 

 Hook.). Pseudobulbs 1-2 ft. long, hollow, bearing dry 

 sheaths: Ivs. short and leathery: raceme slender, 3-12- 

 fld.; fls. white, with small crimson spots on the 3-lobed 

 lip, fragrant. B.M. 3332. G.C III. 16:337. J.H. 

 111.33:29. O.K. 12:113; 16:81; 20:361. A hand- 

 some orchid, requiring high temperature. 



D. bidentdtum, Hemsl. (Epidendrum bidentatum, Lindl.), 

 of Mex., has been listed in trade catalogues, but it is practically 

 unknown to cult., and is probably not now in the American trade. 



L. H. B. 



DIAL&LIA (Compounded of the genera Diacrium 

 and Laelia). Orchidacese. D. Veltchii, Hort., is a hybrid 

 between Diacrium bicornutum and Lselia cinnabarina. 

 Pseudobulbs fleshy: fls. 9 or 10, the segms. white suf- 

 fused with lilac, also showing a bronze tint derived from 

 the La>lia parent. 



DIAMOND FLOWER: lonopsidium. 



DIANDROLtRA (two-stamened Olyrd). Graminese. 

 A single species raised at Kew some 8 years ago from 

 seed supplied by Sander but native country unknown: 

 differs from Olyra in its twin spikelets and other charac- 

 ters, the upper one being male and the lower one 

 female, the male fls. with 2 stamens. The species is D. 

 bicolor, Stapf, a perennial densely tufted grass with 

 erect culms bearing 1-3 lanceolate or lance-oblong Ivs. 

 that are dark green above and violet-purple beneath. 



DIANELLA (diminutive of Diana, goddess of the 

 hunt). Liliacese. Tender perennial rhizomatous plants, 

 related to Phormium. 



Leaves hard, linear, sheathing, grass-like, crowded at 

 base of st., often 2-3 ft. long: fls. blue, in large loose 

 panicles, on delicate pendent pedicels; perianth wither- 

 ing but not falling, with 6 distinct spreading segms.; 

 stamens 6, with thickened filaments; ovary 3-celled, 

 each cell several-ovuled, the style filiform and stigma 

 very small : plant bearing great numbers of pretty blue 

 berries, which remain attractive for several weeks, and 

 are the chief charm of the plant. There are about a 

 dozen species in Trop. Asia, Austral, and Polynesia. 

 They perhaps succeed best in the open border of a cool 

 greenhouse. Prop, by division, or by seeds sown in 

 spring in mild heat. They are little known in this 

 country. They are spring and summer bloomers. 



A. Lvs. radical or nearly so. 



tasmanica, Hook, f . Height 45 ft. : Ivs. numerous, in 

 a rosette, broadly ensiform, 2-4 ft. long, %-l in. wide, 

 margined with small reddish brown spines that cut 

 the hand if the Ivs. are carelessly grasped: panicle 

 very lax, surpassing the Ivs. 1-2 ft., with as many as 

 60 fls.; fls. pale blue, nodding, H~%in. across, segms. 

 finally reflexed; anthers 1 line long: berries bright 

 blue, on very slender pedicels. Tasmania and Austral. 

 B.M. 5551. Var. variegata, Bull. Lvs. handsomely 

 striped with light yellow. R.B. 29:61. 



laevis, R. Br. Lvs. 1-1 ^ ft. long, 6-9 lines wide, less 

 leathery and paler than in D. cserulea and at first slightly 

 glaucous: panicle deltoid, the branches more com- 

 pound than in D. revoluta, outer segms. of the perianth 

 with 5 distant veins, inner ones densely 3-veined in the 

 middle third; anthers 1% lines long. Eastern temperate 

 parts of Austral. B.R. 751. L.B.C. 12:1136 (both as 

 D. strumdsa). 



