DATURA 



Blumengartnerei, by Voss, it is referred to D. humilis, 

 Desf., but D. humilis, in turn, is perhaps a form of D. 

 Jastuosa. 



AAA. Fls. normally white (sometimes touched with violet) 



or purple. 



B. Plants tatt, 7-15 ft. high: blossoms pendulous. 

 c. Calyx tubular, with 5 obscure teeth. 



suaveolens, Humb. & Bonpl. (D. Gdrdneri, Hook.). 

 ANGEL'S TRUMPET. Tree-like shrub, 10-15 ft. high: 

 Ivs. ovate-oblong, 6-12 in. long, 2J^-4 in. wide, entire, 

 glabrous, petioled, often unequal at the base: fls. 

 9-12 in. long; calyx inflated, angled, glabrous, with 5 

 obscure teeth; corolla-tube plaited, the limb with 5 

 short lobes; anthers crowded together. Mex. G.C. III. 

 11:593; 23:71. S.H. 2:433. The double form is much 

 commoner in the gardens than the single. This is the 

 plant which is "usually cult, as D. arborea. It is said to 

 be very distinct from the true D. arborea of Linn., but 

 it can be separated with certainty by the calyx. 



cc. Calyx spathe-like, not toothed. 



arbdrea, Linn. (Brugmdnsia arborea, Steud.). 

 ANGEL'S TRUMPET. Small tree: Ivs. ovate-lanceolate, 

 margin entire, never wavy or angled, pubescent, in 

 pairs, one a third shorter than the other; petioles 1 in. 

 or more long: fls. with a musk-like odor; calyx tubular, 

 entire, spathe-like, acuminate; corolla-tube terete, the 

 lobes of the limb very long; anthers distinct, not con- 

 glomerate. Peru and Chile. G.C. II. 11:141. Most of 

 the plants cult, under this name are presumably D. 

 suaveolens. The extent to which the true D. arborea 

 is cult, is undetermined. 



BB. Plants less tall, only 2-5 ft. high. 

 c. Blossoms erect; calyx not spurred. 



fastuosa, Linn. (D. Hummdtu, Bernh. D. and B. 

 cornucopia, Hort.). Fig. 1227. Annual, 4-5 ft. high, 

 herbaceous: Ivs. ovate-lanceolate, acuminate, acute 

 and unequal at the base, toothed or wavy, glabrous 

 on both sides, solitary, upper ones in pairs one of which 

 is larger, 7-8 in. long, 2J^-3K in. wide; petioles \fyjr 

 2^ in. long: fls. f>%-7 in. long, violet outside, whitish 

 within; calyx purple, angled, 2 in. long, 5-toothed, the 

 teeth triangular lanceolate, acuminate, 5 lines long, 

 2-3 lines wide: caps, spiny, subglobose, 1J^ in. diam. 

 Native of India. Naturalized in the tropics of both 

 worlds. F.S. 14:1457. Gn. 46:224. I.H. 42:25. The 

 commonest garden datura. Resembles the common 

 D. Stramonium, but fls. larger. Var. alba, Clarke (D. 

 alba, Nees), has fls. white or nearly so. (D. alba var. 

 africdna, Fedde, is distinguished by its larger Ivs., 

 longer calyx, and corolla glabrous outside. Italian 

 Somaliland.) Var. dubia, Clarke (D. dubia, Don. D. 

 Nilhummatu, Dunal), has spineless frs. Var. Huber- 

 iana, Hort., is a thick bushy cult, form with large 

 fls. of several colors, running into yellowish, blue and 

 red; it is said to be a hybrid with D. chlorantha. 



meteloides, DC. (D. Wnghtii, Hort.). Perennial 

 (cult, as an annual N.), glaucescent and puberulent: 

 branches slender, forked: Ivs. unequally ovate, almost 

 entire, acuminate, acute at both ends, upper Ivs. often 

 in pairs, the larger 2-2 J^ in. long, 8-9 lines wide; 

 petioles thickened at the base, 4-5 lines wide: calyx 

 tubular, the teeth mostly 5; corolla about 4-8 in. long, 

 or twice as long as the calyx, 5-toothed, the teeth 

 slender-subulate: caps. 2 in. diam., succulent, prickly. 

 Texas to Calif. Gt. 1859:260. R.H. 1857, p. 571. 

 F.S. 12:1266. Fls. white, suffused with violet, fra- 

 grant. Occurs also in Northern Mex. 



cc. Blossoms pendulous; calyx with a long spur. 



cornigera, Hook. (D. and B. Knlghtii, Hort.). 



Height 3-4 ft. : branches downy: Ivs. chiefly at the ends 



of branches, ovate, petioled, acuminate, margin entire, 



wavy or angled: fls. pendulous, white or creamy white, 



62 



DAUCUS 



971 



very fragrant at night, striated, 5-lobed, the lobe ter- 

 minated by a long awl-shaped spreading or recurved 

 point; stamens included. Mex. B.M. 4252. Brug- 

 mansia Knightii seems to be a trade name for only 

 the double form. Gn. 45, p. 549. 



Weedy annual species of Datura, intro. from the tropics or 

 warm countries and run free in this country, are: D. Mitel, Linn. 

 Pubescent: Ivs. entire or slightly toothed: calyx tubular; corolla- 

 limb 10-lobed, 4 in. across: caps, nodding, prickly: 3-5 ft.: fls. 

 white. D. Stramdnium, Linn. Fig. 1228. The common stramo- 

 nium or jimson-weed: glabrous, green-stemmed: Ivs. ovate, sinuate 

 or angled or even cut-toothed: caps erect, with stout prickles: 

 24 ft. : fls. white. A very similar species but 

 with a smooth and spineless caps, is D. 

 inermis, Jacq. D. Tdtula, Linn. Differs from 

 C. Stramonium in having purple sts., and 

 violet-purple or lavender fls., and prickles of 

 the caps, more nearly equal. 



1228. Pods of Datura Stramonium. ( X H) 



Other daturas more or less cult, abroad are: D. ceratocaiila, 

 Ort. Annual, 2 ft.: branches horn-shaped: Ivs. broad-lanceolate: 

 fls. very large, inside white or light violet, outside bluish, opening 

 late in afternoon till middle of forenoon: fr. hanging, smooth. 

 Trop. Amer. B.M. 3352. D. coccinea, Hort.=D. De Noteri. 

 D. coldssea aurea, Hort. Garden hybrid, parentage not reported, 

 with bright golden yellow fls. D. De Ndteri, Hort. Probably 

 annual: 3 ft.: fls. fragrant, brilliant red, freely produced. S. Afr. 

 D. }brox. Linn. St. thick, glabrous, red at base but otherwise green- 

 or white-punctate: Ivs. rhombic-ovate, angled-toothed : calyx 5- 

 angled and about 5-parted; corolla light blue, the limb angulate: 

 fr. unequally spiny, with 4 large spines at top. S. Eu. D. guerci- 

 fdlia, HBK. Annual, with green sts., the young growth somewhat 

 pubescent: Ivs. deeply sinuate-pinnatifid. : fls. as in D. Tatula: 

 caps, bearing large and unequal flattened prickles that are some- 

 times y<i in. long. Mex. 



DAUBENTdNIA: Sesbania. 



WILHELM MILLER. 

 L. H. B.f 



DAUCUS (ancient Greek name). Umbelliferas. Per- 

 haps 60 annual and biennial herbs of very wide distribu- 

 tion. One or 2 species are native to N. Amer.; one 

 species of Daucus is the common garden carrot, and 

 the wild form of the same species is an abundant old- 

 field weed in the northeastern states. Aside from the 

 carrot, there are no horticultural members of the genus. 

 Daucus comprises bristly or setose slender plants, with 

 pinnately decompound and often finely divided Ivs., 

 very small fls. in compound involucrate umbels, and 

 oblong mostly dorsally flattened frs. The species are 

 mostly of the temperate regions of Eu., Afr. and 

 Asia. 



Cardta, Linn. Figs. 821, 822. Bristly biennial, with 

 twice- or thrice-pinnatifid Ivs., the ultimate divisions 

 cut and pointed: fls. crowded in umbellets, mostly 

 white but sometimes blush or even pale yellow, some of 

 the marginal fls. larger; rays of umbel numerous; 

 involucre of many elongated-subulate divisions: fr. 

 (or "seed") small, greenish or brownish, somewhat 

 convex on one side and plane on the opposite side 



