DIPLADENIA 



DIPSACUS 



491 



to D. Martiana, F.S. 'J3:'J;110 may be the same plant as B.R. 

 MIA, but ivilli variable Ivs, and stipules. The plant was prized 

 to, its (leliL-atL- uolors, beiug wliite at tirst, then shot with soft 

 rose like a tlame tulip, and finally a deep rose. Only one Hower 

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

 throat orange inside, I), crassinoda is said to be a parent, 

 with D. splendens, of D. amabilis. (Gn. 44, p, 141.) 1). Har- 

 i-isii, Hook.=Odontadenia speciosa. — X>. illustris, DC Gla- 

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

 acute, rounded or subcordate at the base, many iifi-\ i-d ; stipules 

 none; petiole short: racemes terminal, 4-8tl(l. : tls. rusy, tliroat 

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

 the middle, then funnel-shaped: limb 3-3 H in. across, lobes 

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

 Muell. Arg. B.M. 7156.— D. 5dnd€ri, Hems., has flesh-colored 

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

 Ivs. th;in I), illustris, and no circle of ptirple at the mouth of the 

 tl. Gn. 51:1111. Y^_ il, 



DIPLARRHfiNA (Ureek, two anthers; the third beiog 

 imperfect). IridAcete. 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, coiinivent: upper stamen im- 

 perfect. This plant is advertised in the American edi- 

 tion of a Dutch bulb dealer's catalogue. 



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

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

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

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



DIPLAZIUM (Greek, doubled). PoliipodUXeece. A 

 genus of rather large, coarse ferns allied to Aspleiiium, 

 but with the indusia 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. Xjvs. simple: low plants. 

 Unceum, Thunb. Lvs. 6-9 in. long, %-l in. wide, 

 narrowed upward and downward, the margin mostly en- 

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

 India, China, Japan. 



AA. Lrs. pinnate, with the pinnrn deeply lobed: 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. 



Sh§plierdi, Spreng. (Aspleniwm Shipherdi, Spreng. ). 

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

 at the base sometimes reaching down to the racliis, some- 

 what toothed and often ^i in. broad ; sori 

 long-linear. Cuba and Mexico to Brazil. 



AAA. Lvs. bipinnafe: trunk someivhat 

 arborescent. 



latifdlium, Moore (AspUnium latifdlinm. 719. 



Don). Caudex erect, somewhat arborescent: 

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

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

 P'"*^- L. M. Undekwood. 



DIFLOTHfiMIUM (Greek, double sheathed). Pal- 

 ■mAeeif. tribe Cocoinete. 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: spadices 

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

 2, the lower coriaceous, tlie upper cymbiform, beaked, 

 ventrally dehiscent: bracts short, coriaceous: fls. rather 

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

 small. Species 5. Brazil. 



Diplothemiam 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 pinna; being clu.stered along the 

 midrib in most instances. In a very young plant of thi.s 

 genus the ultimate character is not at all apparent from 

 the fact that the seedling plants have undividetl or simple 

 leaves, this characteristic frequently obtaining in the 

 case of D. candescens 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 Uiplothe- 

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

 and where space may be bad for its free development it 

 is one of the handsomest palms in cultivation. 



caudescens, Mart. {Cerdxylon nireum, 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. R.H. 1876, p. 2:!5. 



Jared G. Smith and W. H. Taplin. 



DtPSACUS [to thirst, from the Greek: the bases of 

 the connate lvs. in some species hold water). Dips&cem. 

 Teasel. Perhaps 15 species of tall, stout biennial or 



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

 and in dense heads, like those of compositous plants, 

 but the anthers are njt anited (or syngenesious) as they 

 are in the Compositse. One species, D. sylr/stris. 

 Mill., is an introduced weed along roadsides in the 

 northeastern states and f)hio 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 Fnller's 

 Teasel, D. Fnllbniim. 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 etScient. This 

 plant is grown commercially in a limited area in central 

 New York. l. g. g 



