1080 



DRYOPTERIS 



DUGUETIA 



15. dissecta, Kuntze (Lastrea membranifdlia, Hort.). 

 Lvs. 1-5 ft. long, 1-3 ft. wide, membranous, decom- 

 pound; segms. broad and blunt; surfaces nearly naked: 

 sori near the margin, abundant. India and Madagascar 

 to Austral. 



AA. Veins not entirely free, the lower veinlets of adjoin- 

 ing segms. united. 



16. Otaria, Kuntze (Lastrea aristata, Hort.). Lvs. 

 1 ft. long, with a long terminal pinna an inch or more 

 wide, with lanceolate lobes, and 6-12 similar lateral 

 pinnae; texture thin; surfaces naked; veins united half- 

 way from the midrib to the edge. Ceylon to the Philip- 

 pines. Good for table ferneries, but slow of growth. 



17. parasitica, Kuntze (Nephrodium mdlle, R. Br. 

 D. mdllis, Underwood, in preceding edition). Fig. 1364. 

 Lvs. 1-2 ft. long, 8-12 in. wide, bipinnatifid, the pinnae 

 cut into blunt lobes; lower pinnae distant from the 

 others and somewhat shorter; surfaces finely villose. 

 Tropical regions of both hemispheres. Often grows as a 

 weed in greenhouses. 



18. basilaris, C. Chr. (Nephrbdium philippinense, 

 Baker. D. philippinensis, Underwood, in Cyclo. Amer. 

 Hort.). Lvs. 2-3 ft. long, 12-18 in. wide, bipinnatifid, 

 smooth, with a naked rachis; lower pinnae scarcely 

 smaller: sori midway from midrib to margin, with firm, 

 smooth indusia. Philippines. 



19. crenita, Presl. Lvs. 1-2 ft. long, on stalks nearly 

 as long, with a terminal pinnse 6-8 in. long, often 2 in. 

 wide, and 4-8 similar lateral pinnae; margins bluntly 

 lobed: sori near the main veins. Cuba and Mex. to 

 Brazil. L. M. UNDERWOOD. 



R. C. BENEDICT.! 



DRYPETES (probably from Greek for drupe, from 

 the character of the fruit). GUIANA PLUM. WHITE- 

 WOOD. Euphorbidcese. Tropical evergreen greenhouse 

 shrubs. Glabrous: Ivs. leathery, alternate, simple, 

 mostly entire: fls. dioecious, in axillary clusters or pis- 

 tillate single, apetalous, staminate fls. with calyx im- 

 bricate and a rudimentary pistil; stigma broad, nearly 

 sessile; pistil 1-celled, 2-ovuled. About 10 species in 

 Trop. Amer., 2 native in S. Fla. They do well in light 

 loam. Prop, from cuttings in sand with heat. D. 

 laterifldra, Urban (D. crocea, Poit. Schaefferia lateriflora, 

 Swartz), of W. India region, 6 ft. high, Ivs. elliptical, 

 pointed, has been in cult. j. g. g. NORTON. 



DUCHfiSNEA (A. N. Duchesne, monographer of 

 Fragaria in 1766). Rosacese. Fragaria-like perennial 

 trailing herbs, differing in the calyx being 5-parted and 

 the lobe.8 alternating with larger leafy 3-5-toothed 

 bracts, the petals yellow, and the receptacle dry and 

 spongy rather than becoming fleshy or pulpy as in the 

 strawberry: Ivs. ternate, with short-stalked Ifts.: fls. 

 solitary, on the runners; stamens 20-25, short. Two 

 species in S. Asia, one of which has run wild in this 

 country, and is useful as a basket-plant and as a low 

 ground-cover. 



indica, Focke (Fragaria indica, Andr.). YELLOW 

 STRAWBERRY. A neat plant trailing close on the ground, 

 with leafy runners, pubescent: Ifts. rhombic-ovate, 

 more or less petioled, coarsely crenate, obtuse: fls. 

 about %in. across, on peduncles equaling or exceed- 

 ing the Ivs.: fr. usually less than J^in. diam., red, 

 insipid. In waste grounds, N. Y., west and south. 



L. H. B. 



DUCKWEED: Lemna. 

 DUCKWHEAT: Fagopyrum. 

 DUDAIM MELON: Cucumis. 



DUDLEYA (named for the late Wm. R. Dudley, 

 professor of botany in Stanford University). Crassu- 

 Idceae. Shortly caulescent or acaulescent perennials, 

 with flat, linear to ovate, acute basal Ivs. : fls. in short 



or elongated panicles, orange-yellow or red, rarely 

 white: Ivs. on flowering branches much shorter and 

 relatively broader than the basal ones, sessile or clasp- 

 ing: corolla nearly cylindrical or slightly angled, the 

 segms. united below the middle; stamens twice as 

 many as the calyx-lobes: carpels erect, many-sided. 

 Some 60 species have been described, all from the west 

 coast of N. Amer. None of them has proved very 

 satisfactory as a bedding plant, and as a rule the spe- 

 cies do not compare with the echeverias in horticul- 

 tural value. The following species are described in 

 this work under Cotyledon (p. 868) : 



D. Cotyledon, Brit. & Rose, as C. californica. 



D. pulverulenta, Brit. & Rose, as C. pulverulenta. 



D. Purpusii, Brit. & Rose, as C. Purpusii. 



D. lanceolata, Brit. & Rose, as C. lanceolata. 



J. N. ROSE. 



DUGUETIA (named in honor of J. J. Duguet, who 

 in 1731 wrote a work on plants). Aberemda, R. E. 

 Fries, not Aubl. Annonacese. A genus of Trop. Ameri- 

 can shrubs and trees, about two dozen species, differing 



1365. Duguctia quitarensis. (Branch X 1 A) 



from Annona in technical characters, particularly in 

 imbricating petals and distinct angular rigid carpels 

 becoming detached from the alveolate receptacle when 

 mature, and usually with stellate-pubescent or scurfy 

 indument. D. lanceolata, St. Hil., the type of the 

 genus, is a Brazilian tree. D. quitarensis, Benth., 

 Fig. 1365, with very similar fr. which turns red when 

 ripe, has recently been collected on the Isthmus of 

 Panama by Henri Pittier; and D. furfur&cea, Benth. 

 & Hook, f., a low plant with edible orange-colored fr. 

 as large as an apple, in the province of Minas, Brazil, 

 by Shamel, Popenoe, and Dorsett, of the Bureau of 

 Plant Industry. From this genus must be separated 

 Fusaea longifolia l Safford (Annona longifolia, Aubl.), 

 the fr. of which is a solid globose syncarpium, and the 

 outer circles of stamens sterile and petal-like, while 

 the indument is composed of simple silky hairs. See 

 Fussea. w. E. SAFFORD. 



