D.KDALACANTHUS 



DAHLIA 



951 



and what are known as Eranthemum in this work 

 then become Pseuderanthemum. 



This genus contains some tender shrubs of rather 

 difficult culture under glass, but great favorites in the 

 tropics, particularly in India. D. nervosus is a popular 

 winter- and spring-blooming shrub in southern Florida. 

 It has blue flowers an inch across, five-lobed, and 

 shaded purple at the mouth of the tube. For culture, 

 see Justicia. 



nervosus, T. Anders. (Erdnthemwn nervosum, R. 

 Br. E. pulchellum, Andr., and some dealers, while 

 that of others is E. blcolor, and that of Roxburgh is >. 

 purpurascens) . Fig. 1204. Glabrous or very nearly so: 

 Ivs. ovate or elliptical, acuminate at both ends, some- 

 what crenate or entire: spikes axillary, opposite, over- 

 lapping and interrupted: bracts elliptical, acute, ner- 

 vose : limb of the corolla as wide as the tube is long. 

 India. B.M. 1358 (as Justicia nervcsa). Gn. 51:352. 

 G.C. II. 21:415. A very pretty shrub for the warm- 

 house, 2-6 ft., its fls. being of a color that is not very 

 common in winter-blooming plants. It is an easy sub- 

 ject to manage, requiring a light, rich soil, full sunlight 

 and plenty of water. Cuttings of young growth root 

 readily in a warmhouse. 



macrophyllus, T. Anders. St. pubescent toward top: 

 Ivs. elliptic-lanceolate, ovate-acuminate, attenuate at 

 base: spikes linear, somewhat interrupted: bracts 

 elliptic, rather obtuse, nervose: fls. pale violet-blue. 

 India. B.M. 6686. Differs from D. nervosus in laxer 

 infl., hairy Ivs. which are scabrid-pubescent on the 

 nerves beneath, and more pubescent shoots. 



Wattii, Bedd. (D. pdrvus, C. B. Clarke). Slender, 

 2 ft. : Ivs. deep green with a light metallic shade, very 

 broad-ovate: fls. 1 in. across, blue or violet-blue, the 

 corolla-lobes broad-oboyate and narrowed abruptly 

 to a point, the white stigma protruding from the nar- 

 row throat. India. G.M. 44:645. G.C. III. 32:311. 

 A.F. 17:382. A good dwarf species with fls. in dense 

 clusters, blooming in pots when 1 ft. high and flower- 

 ing in Sept. Requires a warmhouse treatment; grows 

 well in sandy loam; prop, by cuttings. L < jj g + 



D-EMONOROPS (probably means God-like, of 

 divine appearance). Palmacese, tribe Lepidocdrpeas. 

 Slender pinnate palms grown for their graceful foliage, 

 but little known in Amer. outside of botanic gardens. 

 Differs from Calamus (with which it is by some united) 

 only in having the outer sheaths or spathes boat-shaped, 

 deciduous, at first inclosing the inner sheaths; its more 

 longly stalked fls. also separate it from Calamus. 

 About 85 species, all Trop. Asiatic. Only a very few 

 are in cult. Treatment and general cultural conditions 

 of Calamus. D. Draco produces some of the "dragon's 

 blood" of commerce. See page 3568. 



A. Young Ivs. green. 

 B. Sts. erect or climbing, sometimes both in one plant. 



calicarpus, Mart. (Calamus calicdrpus, Griff.). St. 

 erect or climbing, 1 in. diam.: Ivs. 6-8 ft. long, upper 

 small with long flagella; Ifts. numerous, 12-13 in. long, 

 ^j-J^m- wide; petiole 1 ft., the base not gibbous or puck- 

 ered: fr. about %in. diam., tawny. Malacca. 



melanochaetes, Blume. St. erect: Ivs. pinnate, 10-12 

 ft. long in nature, the pinna; long and narrow, dark 

 green and drooping, furnished with many cirrhi, the 

 petioles sharp-spined at the sheathing base: fr. yellow- 

 green. Malaya. Very decorative. A small form is 

 var. microcarpus. Little known in U. S. 



BB. Sts. always climbing. 



Lewisianus, Mart. (Calamus Lewisidnus, Griff.). 

 St. climbing, 1 in. diam.: petiole 1 ft., base much 

 swollen, armed below with scattered, short, deflexed 

 spines, and above with straight and hooked spines 1% 

 in. long; Ifts. 13-15 in. long, %-l in. wide; sheath 



armed with solitary or seriate flat-back spines: fr. pale 

 yellowish. Penang. 



intermedius, Mart. St. 15-20 ft., %in. diam.: Ivs. 

 long-petioled, 4-6 ft. long; Ifts. opposite or scattered, 

 18-20 in. long, 1-1 ^ in. wide, linear-lanceolate, acumi- 

 nate, margins and 3-5 costae bristly above and below; 



1204. Daedalac an thus nervosus. 



rachis semi-cylindrical, sparingly armed; petiole 1 ft. 

 long, with flattened spines. Malaya. 



AA. Young Ivs. brownish or straw-colored. 



palembanicus, Blume. St. erect: Ivs. pinnate, 

 broadly ovate, bright cinnamon-brown when young, 

 and Ifts. many, long, narrow, \\^ ft. long, about j^in. 

 wide; petioles erect, with stout spines on the back, 

 which are deflexed and not thickened at the base and 

 are arranged singly or in series. Sumatra. F. 1873, 

 p. 136. 



periacanthus, Miq. Height 15 ft.: resembles D. 

 palembanicus, but the young Ivs. are nearly straw- 

 colored, and the spines are placed in irregular rings. 

 Sumatra. A most graceful species. 



D. plumdsus, Hort. Graceful plume-like Ivs., with pinnae 

 4 ft. or less long; petioles with rigid black spines with white oases. 

 India. F. 1871, p. 39. Not in cult, in N. Amer. 



JARED G. SMITH. 

 N. TAYLOR.! 



DAFFODIL: Narcissus. Daffodil, Sea: Pancratium. 



DAHLIA (named after Professor Andreas Dahl, a 

 Swedish pupil of Linna3us, and author of "Observa- 

 tiones Botanic*"). Syn. Georgina. Composite. Stout 

 perennial herbs, sometimes somewhat woody, much 

 grown out-of-doors for the rich and profuse autumn 

 bloom. Plate XXXIV. 



Tuberous-rooted (Fig. 1205) : st. mostly erect, branch- 

 ing, glabrous or scabrous: Ivs. opposite, 1-3-pinnate: 

 heads long-peduncled, large, with yellow disk and 

 rays in a single series and mostly in shades of red and 

 purple and also in white (in cult.); ray-fls. neutral or 

 pistillate, disk-fls. perfect and fertile; involucre double. 

 the inner series of thin scales that are slightly united 

 at base, the exterior series smaller and somewhat leafy; 



