1066 



DOMBEYA 



DORONICUM 



exceeding petals; staminodia narrowly spatulate; 

 ovary tomentose. Nairobi. 



Wallichii, Benth. & Hook. (Astrapsea Wdllichii, 

 Lindl.). Tree, to 30 ft.: Ivs. large, velvety, cordate, 

 angularly lobed, with leafy stipules: fls. scarlet (pink?), 

 in drooping umbels, the peduncles long and hairy. 

 Madagascar. A very showy plant when in bloom. 



D. Burgessix, Gerrard. Lvs. pubescent, cordate, but with 2 

 deep, wide cuts, and 2 shallow ones besides the basal one: fls. 

 numerous, large, white, rosy at center and along veins; petals 

 rounded. S. Afr. B.M. 5487. D. caldntha, Schum. Shrub, 10-12 

 ft.: Ivs. large (1 ft. across), 3-5-lobed, coarsely toothed, cor- 

 date at base, pubescent above and tomentose beneath, with long 

 petioles: fls. rose-colored, \Yz in. across. British Cent. Afr. B.M. 

 8424. D. Cayeiixii, Hort., is a hybrid of D. Mastersii and D. Wal- 

 lichii: fls. beautiful pink in pendulous, many-fld. umbels: Ivs. cor- 

 date, acute, dentate, with long petioles. D. Cdria, Baill. Tall 

 tree: Ivs. cordate or somewhat 3-lobed, 6 in. long and nearly as 

 broad, toothed or crenulate, pubescent beneath: fls. lilac-rose, 2^ 

 in. across. Madagascar. R.H. 1911:84. D. Davaei, Hort., is a 

 hybrid of D. spectabilis and D. natalensis: fls. rose-colored; also a 

 white-fld. form (var. alba). R.H. 1912, p. 178-9. D. Mdstersii, 

 Hook. Shrub, 4-5 ft. high: Ivs. velvety, heart-shaped, serrate: fls. 

 fragrant, white, with thinner veins of rose than in D. Burgessiffi; 

 petals acute. Trop. Afr. B.M. 5639. D. viburnifldra, Bojer, has 

 very numerous white fls. with narrower petals than any here des- 

 cribed: Ivs. cordate, 3-lobed, the cuts not so wide as in D. Bur- 

 gessise. Comoro. B.M. 4568. j H R t 



DONDIA: Hacquetia. 



DOODIA (after Samuel Doody, London apothecary). 

 Polypodidcex. Greenhouse ferns. 



Sori curved, placed in one or more rows between 

 the midribs and the margins of the pinnae: Ivs. rigid. 

 A genus of diminutive ferns related to Woodwardia. 

 Species 4 or 5. Ceylon to New Zeal. 



All doodias, except D. blechnoides, are of dwarf 

 habit, and are useful for fern-cases and for edgings of 

 window boxes. Cool and intermediate temperatures 

 are best. They are excellent for forming an under- 

 growth in coolhouses, as they seldom are infested with 

 insects, and endure fumigation. Schneider recom- 

 mends three parts of peat and one of silver sand. Loam 

 does not help, but a little chopped sphagnum does. 

 They are very sensitive to stagnant water, and do not 

 like full exposure to sunlight. Always propagate by 

 spores, but division is possible. 



A. Lvs, pinnatifid. 



aspera, R. Br. Lvs. 6-18 in. long, 2-4 in. wide, 

 pinnatifid, narrowed gradually below: sori in 1 or 2 

 rows. Temp. Austral. Crested varieties occur in cult. 



AA. Lvs. pinnate in the lower half. 



media, R. Br. Lvs. 12-18 in. long, with pinnae 1-2 in. 

 long, the lower one gradually smaller. Austral, and 

 New Zeal. D. Kunthiana, Gaud., from the Hawaiian 

 Isls. has close median pinna3. D. superba, Hort., is a 

 larger garden form. 



caudata, R. Br. Lvs. 6-12 in. long, with pinnae about 

 an inch long, the spore-bearing ones shorter; apex often 

 terminating in a long point. Austral, and New Zeal. 



blechnoides, Cunn. Lvs. 18 in. long; If .-blades 15 

 in. long, 6 in. broad, broadest at the middle, the lowest 

 pinnae considerably narrowed; margins serrate: sori in 

 an irregular row near midrib. New S. Wales. 



L. M. UNDERWOOD. 

 R. C. BENEDICT.! 



DOREMA (dorema, a gift, an allusion to the gift of 

 gum ammoniac). Umbelliferse. About 4 odd large 

 perennial herbs of S. W. Asia, yielding gum-resins, 

 likely to be met with in collections of economic plants. 

 Usually glaucous, with pinnately decompound Ivs., 

 and small white or yellow fls. in close woolly umbels: 

 calyx-teeth wanting or nearly so; petals ovate: fr. 

 ovate, piano-compressed. D. Ammoniacum, D. Don, 

 an erect fleshy-stemmed herb to 7 ft., with a few Ivs. 

 near the base and bracts above, yields gum-ammoniac, 

 a medicinal product. This resin exudes on the sting 

 of insects, occurring in yellowish brown "tears" or drops; 



it has a balsamic odor and bitter unpleasant taste. 

 The plant is native in Persia and Afghanistan. Other 

 species yield similar exudation. 



DORONICUM (Latinized Arabic name). Compdsitse. 

 LEOPARD'S BANE. Hardy herbaceous plants, 1-2 feet 

 high, with yellow many-flowered heads. 



Stems little branched or not at all: Ivs. alternate, 

 radical ones long-stalked, st.-lvs. distant, often clasp- 

 ing the st.: heads mostly one on a st. and 2-3 in. 

 across, borne high above the basal crown of foliage, from 

 April to June. From 20-30 species, natives of Eu. and 

 Temp. Asia. The genus is allied to Arnica and dis- 

 tinguished by the alternate Ivs. and by the style. 



The plants are of easy culture in rich loam except D. 

 cordifolium, which is an alpine species. The flowers are 

 numerous and good for cutting. Doronicums have 

 been strongly recommended for forcing. 



A. Root-lvs. not notched at the base, ovate. 



plantagineum, Linn. Glabrous, but woolly at the 

 neck, with long, silky hairs: root-lvs. ovate or oval, 

 wavy-toothed; st.-lvs. nearly entire, the lower ones 

 narrowed into a petiole and not eared, the upper ones 

 sessile, oblong, acuminate : rhizome tuberous, roundish, 

 or creeping obliquely: stalk of the root-lvs. about 3 in. 

 long: typically about 2 ft. high. Sandy woods of Eu. 

 G.C. III. 17:229. J.H. III. 55:109. Gn. 60:151. Var. 

 excelsum, Hort. (D. excelsum, Hort. D. "Harpur 

 Crew," Hort.), is more robust, grows about 5 ft. high 

 and is probably more cult, than any other kind of 

 doronicum. Fls. sometimes 4 in. across. Gn. 47, p. 

 269; 28:512; 38:437. G.C. II. 20:297. G. 19:441; 

 27:225. Gn. W. 24:221. 



Clfcsii, Tausch. (Arnica Clusii, All.) Lvs. ovate or 

 oblong; st.-lvs. half clasping, with distant teeth or 

 many small ones. One subvariety has long, silky hairs 

 on its Ivs., while another has none. Swiss and Austrian 

 Alps. "Soft, downy foliage," J. W. Manning. "Grows 

 2 ft. high," Woolson. "Larger and later fls. than D. 

 caucasicum," Ellwanger and Barry. 



AA. Root-lvs. notched at the base, heart-shaped. 



B. Root tuberous. 



Pardalianches, Linn. Hairy: Ivs. toothed; lower st.- 

 lvs. eared at the base of the stalk, subovate, upper ones 

 spatulate-cordate, highest ones cordate-clasping, acute. 

 Woods of lower mountains of Eu. G. 22:499. While 

 all species are typically 1-fld., any of them may have 

 now and then more than 1 fl. on a st., and this species 

 particularly may have 1-5 fls. 



BB. Root not tuberous. 



caucasicum, Bieb. Glabrous except as noted above: 

 Ivs. crenate-dentate, lower st.-lvs. eared at the base 

 of the stalk, the blade subcordate, highest ones cordate 

 to half -clasping; Ivs. near the infl. linear-lanceolate. 

 Shady woods of Caucasus, Sicily, etc. B.M. 3143. Gn. 

 28 p. 512., which shows sts. with 1 fl. and 1 If. Fls. 2 

 in. across. 



cordif&lium, Sternb. (D. Columnse, Tenore). Gla- 

 brous, the st. very fibrous toward the base, scarcely 

 5 in. tall: radical Ivs. cordate-kidney-shaped, the upper 

 Ivs. st.-clasping: heads solitary on the sts., the small 

 Ivs. near it ovate-lanceolate, acuminate. An alpine 

 species from S. E. Eu. and adjacent Asia. 



austriacum, Jacq. A trifle hairy: Ivs. minutely 

 toothed, lower st.-lvs. spatulate-oyate, abruptly nar- 

 rowed at the base, half-clasping, highest ones cordate- 

 clasping, lanceolate. Subalpine woods, Eu. 



D. draytonense, Hort., is a list name, not referable to any known 

 species. It seems not to occur in horticultural or botanical liter- 

 ature./), magnificum, Hort., described as a "very attractive 

 perennial with large yellow fls. somewhat like a single sunflower," ia 

 also doubtful. It may be D. plantagineum var. excelsum. 



WILHELM MILLER. 

 N. TAYLOR. f 



