500 



DOMBEYA 



DORSTENIA 



D. acutdngula, Cav. Height 9 ft. : Ivs. glabrous, heart-shaped, 

 long-acuminate, serrate, deeply 3-5-lobed or cleft: fls. few, large, 

 pink, in compact, forking corymbs. Mauritius. B.M. 2905 

 shows a form with entire Ivs. D. Burgessice, 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. Africa. B.M. 5487. 

 D. Mdstersii, Hook. Shrub, 4-5 ft. high: Ivs. velvety, heart- 

 shaped, serrate: fls. fragrant, white, with thinner veins of rose 

 than in D. Burgessige; petals acute. Trop. Afr. B.M. 5639. 

 D. viburniflora, Boj., has very numerous white fls. with nar- 

 rower petals than any here described: Ivs. cordate, 3-lobed, the 

 cuts not as wide as in D. Burgessise. Comoro. B.M. 4568. 



DOODIA (after Samuel Doody). Polypodiacece. A 

 small genus of greenhouse ferns from Ceylon, Malaya 

 and New Zealand. Sori curved, placed in one or more 

 rows between the midribs and the margins of the pinnae. 



A. Lvs. pinnatifid. 



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

 pinnatifid, the lower pinnae gradually becoming smaller: 

 sori in 1 or 2 rows. Australia. Crested varieties occur in 

 cultivation. 



AA. Lvs. pinnate in the lower half. 



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

 long, the lower ones gradually smaller. Australia and 

 New Zealand. D. Kunthld.ua, Gaud., from the Hawaiian 

 Islands, has close central pinnae. D. supfoba, 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 of ten 

 terminating in a long point. Australia and New Zealand. 



L. M. UNDERWOOD. 



According to Schneider's Book of Choice Ferns, all 

 Doodias, except D. blechnoides, are of dwarf habit, and 

 are useful for fern-cases and for edgings of window 

 boxes, especially for northern aspects, where flowering 

 plants do not prosper. Cool and intermediate tempera- 

 tures are best. They are excellent for forming an under- 

 growth in cool houses, as they are seldom infested with 

 insects, endure fumigation, and do not care whether their 

 taller neighbors are syringed or not. Schneider recom- 

 mends 3 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 prop, by spores, but 

 division is possible. 



In the American Florist 12:142, " A. H." writes: />. 

 aspera and its crested variety are most useful, but they 

 can hardly be recommended as market ferns. They re- 

 quire similar treatment to the Blechnums, and are seen 

 at their best in a 4-inch pot. The young fronds have a 

 very bright tint, which livens up the more somber hue 

 of the older fronds. They lose the bright tint much more 

 quickly when allowed to get too dry. Being of slender 

 growth, care should be taken not to over-pot. They like 

 plenty of leaf -mold and peat in the compost, and good 

 drainage." 



DOOR-WEED. Polygonum aviculare. 



DOR6NICUM (Latinized Arabic name). Compdsitce. 

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

 high, with yellow flowers, mostly one on a stem and 2-3 

 in. across, borne high above the basal crown of foliage, 

 from April to June. From 10-24 species, natives of 

 Europe and temperate Asia. Stems little branched or 

 not at all: Ivs. alternate, radical ones long-stalked, stem- 

 Ivs. distant, often clasping the stem. The genus is al- 

 lied to Arnica, and distinguished by the alternate Ivs. and 

 by the style. The plants are of easy culture in rich loam. 

 The flowers are numerous and good for cutting. Doroni- 

 cums 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 : stem-lvs. nearly entire, the lower ones narrowed 

 into a petiole and not eared, the upper ones sessile, ob- 

 long, acuminate. Sandy woods of Eu. Rhizome tuberous, 

 roundish, or creeping obliquely. Stalk of the root-lvs. 

 about 3 in. long. Typically about 2 ft. high. G.C. III. 



17:229. Var. excSlsum, Hort. (D. excelsum, Hort. D. 

 "Harpur Crewe," 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, and 28:518. G.C. II. 20:297. 



Clusii, Tausch. Lvs. ovate or oblong; stem-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 foli- 

 age," 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. Hoot tuberous. 



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

 lvs. eared at the base of the stalk, sub-ovate, upper ones 

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

 Woods of lower mts. of Eu. While all species are typi- 

 cally 1-fld., any of them may have now. and then more 

 than 1 fl. on a stem, and this species particularly may 

 have 1-5 fls. 



BB. Root not tuberous. 



Caucasicum, Bieb. Glabrous except as noted above: 

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

 of the stalk, the blade subcordate, highest ones cordate 

 to half -clasping. Shady woods of Caucasus, Sicily, etc. 

 B.M. 3143, which shows stems with 1 fl. and 1 If. Fls. 

 2 in. across. 



Austriacum,Jacq. A trifle hairy: Ivs. minutely toothed, 

 lower stem-lvs. spatulate-ovate, abruptly narrowed at 

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

 lanceolate. Subalpine woods, Eu. ^. M. 



732. Dorstenia Contrajerva (X%). 



DORSTENIA (an early German botanist, Theodor 

 Dorsten). Urtlcacece (or Moracece). Between 40 and 

 50 tropical herbs, remarkable for the dilated receptacle 



