DIPLADENIA 



DIPSACUS 



491 



to D. Martiana. F.S. 22:2310 may be the same plant as B.B. 

 30:64, but with variable Ivs. and stiptdes. The plant was prized 

 for its delicate colors, being white at first, then shot with soft 

 rose like a flame tulip, and finally a deep rose. Only one flower 

 in a raceme was open at a time, and each lasted 8 or 9 days, 

 throat orange inside, D. erassinoda is said to be a parent, 

 with D. splendens, of D, amabilis. (Gn. 44, p. 141.) X>. Mdr- 

 risii, Hook.=Odontad6nia speciosa. — D, UlustriBy DC. Gla- 

 brous or pubescent: Ivs. oblong or rotund, obtuse or nearly 

 acute, rounded or subcordate at the base, many nerved; stipules 

 none; petiole short: racemes terminal, 4-8-fld.: fls. rosy, throat 

 yellow inside, purple at the mouth: corolla tube cylindrical to 

 the middle, then funnel-shaped; limb 3-3^2 in. across, lobes 

 rosy, orbicular-ovate, obtuse. Brazil. F.S. 3:256. Var. glabra, 

 Muell. Arg. B.M. 7156.— D. Sdnd«ri, Hems., has flesh-colored 

 fls. with throat yellow inside, and outside at the base has smaller 

 Ivs. than D. illustris, and no circle of purple at the mouth of the 

 fl. Gn. 61:1111. ^Vy^. M. 



DIFLABBH£NA (Greek, two anthers; the third being 

 imperfect). Iridhcem. Only 2 species of tender plants 

 from Australia and Tasmania. They belong to the same 

 subtribe with our native Blue-eyed Grass, Sisyrinchium. 

 Rhizomes short: stems terminal, erect, simple or some- 

 what branched: Ivs. in a tuft, narrow, rigid, acuminate, 

 equitant; spathe terminal, rigid, acuminate: fls. whitish; 

 perianth without any tube over the ovary ; segments un- 

 equal, inner ones shorter, connivent : upper stamen im- 

 perfect. This plant is advertised in the American edi- 

 tion of a Dutch bulb dealer's catalogue. 



Morsa, Labill. Stems lK-2 ft. long, with a single 

 terminal cluster, and several sheathing bracts : Ivs. 6-8 

 in a tuft, 1-1^ ft. long, Ji-3^ in. wide: spathes cylindri- 

 cal, 2-3 fld., 2 in. long. 



DIFLAZIXJM (Greek, doubled) . Polypodi&cem. A 

 genus of rather large, coarse ferns allied to Asplenium, 

 but with the mdusia often double, extending to both 

 sides of some of the veins, which are unconnected. 

 Eighty or more species are found, mostly in the warmer 

 portions of the world. For culture, see Ferns. 



A. ivs. simple: low plants. 

 Mnceum, Thunb. Lvs. 6-9 in. long, Ji-1 in. wide, 

 narrowed upward and downward, the margin mostly en- 

 tire; sori reaching nearer to the edge than the midrib. 

 India, China, Japan. 



AA. Z/vs. pinnate, with the pinnce deeply lohed: rootstock 

 not rising to form a trunk. 



arbdreum, Willd. Lvs. 12-18 in. long, 6-8 in. wide, 

 with a distinct auricle or lobe at the base. The habit is 

 not arboreous, as originally supposed, and as the name 

 would indicate ; quite near the next, but less deeply cut. 

 West Indies and Venezuela. 



SMpherdi, Spreng. {AspUnium ShSpherdi, Spreng.). 

 Lvs. 12-18 in. long, 6-9 in. broad, deeply lobed, the lobes 

 at the base sometimes reaching down to the rach is, some- 

 what toothed and often )4 in. broad ; sori 

 long-linear. Cuba and Mexico to Brazil. 



AAA. Zivs. bipinnate: trunk somewhat 

 arborescent. 



latiidlium, *Ioore (Asplenium latifdlium, 

 Don). Caudex; erect, somewhat arborescent: 

 lvs. 3-4 ft. long, 12-18 in. wide, with about 

 12 pinnBB on either side. India, China and the Philip- 

 pines. L. M. Undeewood. 



DIPLOTHEMXUM (Greek, double sheathed). Pal- 

 md,ce(e, tribe Gocolnece. Spineless palms, low or stem- 

 less, or often with ringed, stout, solitary or fascicled 

 trunks. Lvs. terminal, pinnatisect; segments crowded, 

 lanceolate or ensiform, acuminate, glaucous or silvery 

 beneath, margins recurved at the base, midnerve promi- 

 nent : rachis 2-faced, strongly laterally compressed ; 

 petiole concave above: sheath fibrous, open: spadioes 

 erect, long or short-peduncled, strict, thickish : spathes 

 2, the lower coriaceous, the upper cymblform, beaked, 

 ventrally dehiscent : bracts short, coriaceous ; fls. rather 

 large, cream colored or yellow: fr, ovoid or obovoid, 

 small. Species 5. Brazil. 



Dlplothemium is a small genus of very handsome 

 palms. In size the members of this genus seem to vary 

 as much as those included in the Coeos group. D. mariti- 



mum, which is found along the coast of Brazil, is but 10 

 feet in height when fully developed. This genus is with- 

 out spines, the leaves being pinnate, very dark green on 

 the upper side and usually covered with white tomentum 

 on the under side, the pinnce being clustered along the 

 midrib in most instances. In a very young plant of this 

 genus the ultimate character is not at all apparent from 

 the fact that the seedling plants have undivided or simple 

 leaves, this characteristic frequently obtaining in the 

 case of D. catidescens until the plant is strong enough 

 to produce leaves 4 or 5 feet long. A warm greenhouse, 

 rich soil and a plentiful supply of water are among the 

 chief requisites for the successful culture of Diplothe- 

 miums. D. caudescens is the best known of the genus, 

 and where space may be had for its free development it 

 is one of the handsomest palms in cultivation. 



caudescens, Mart. (Gerixylon niveum, Hort. ). Wax 

 Palm. Stem 12-20 ft. high, 10-12 in. thick, remotely 

 ringed, often swollen at the middle: lvs. 9-12 ft., short 

 petioled; segments 70-90 on each side, ensiform. densely 

 waxy white below, the middle ones 24-28 in. long, 1% 

 in. wide, the upper and lower ones shorter and narrower, 

 all obtuse at the apex. Brazil. B.H. 1876, p. 235. 



Jared G. Smith and W. H. Taplin. 



DtFSACTJS {to thirst, from the Greek: the bases of 

 the connate lvs. in some species hold water) . Dipsd-cete. 

 Teasel. Perhaps 15 species of tall, stout biennial or 



Fuller's Teasel— Dipsacus 

 FuUonum (X%). 



perennial herbs of the Old World. The fls. are small 

 and in dense heads, like those of compositous plants, 

 but the anthers are not anited (or syngenesious) as they 

 are in the Compositae. One species, D. sylvistris, 

 Mill., is an introduced weed along roadsides in the 

 northeastern states and Ohio valley. It is biennial, 

 the stem arising the second year and reaching a height 

 of 5 or 6 ft. It is said to be a good bee plant. The Fuller's 

 Teasel, D. Fullbnum, Linn. (Fig. 719), is probably de- 

 rived from the former, and differs from it chiefly in the 

 very strong and hooked floral scales. These scales give 

 the head its value for the teasing or raising the nap on 

 woolen cloth, for which no machinery is so efBcient. This 

 plant is grown commercially in a limited area in central 

 New York. L. H. B. 



