1068 



DOUGLASIA 



DRABA 



with broader often spatulate Ivs. which are entire and sparingly 

 denticulate. Cascade Mts., Wash. D. Isevigdia, Gray. Mature Ivs. 

 coriaceous, the margin smooth or rarely minutely ciliate, blade 

 oblong or oblong-lanceolate and obtuse: fls. 2-5; corolla-tube 

 almost twice as long as calyx. Ore., Wash. D. montana, Gray. 

 Mature Ivs. prominently ciliate on the margins, destitute of forked 

 hairs, the blade very small and linear or lanceolate: fls. single, the 

 corolla-tube less than the calyx or just equaling it. Mts., Wyo., 

 Mont. Runs into several forms, 2 of which have been described as 

 species (D. biflora, Nelson and D. or Androsace uniflora). D. nivalis, 

 Lindl. Mature Ivs. covered with minute 2-3-forked pairs, margins 

 not ciliate, blade linear and usually entire: fls. 3-7, the corolla-tube 

 hardly exceeding the calyx. Columbia River. L H B t 



DOUGLAS SPRUCE : Pseudotsuga Douglasii. 



DOWNINGIA (after Andrew Jackson Downing, 

 famous American pomologist and landscape gardener). 

 Campanulacese; or Lobeliaceae when this family is kept 

 distinct. Low herbs, much branched, sometimes grown 

 as garden annuals; flowers blue with white or yellow 

 markings or blotches. 



Leaves alternate, entire, passing above into bracts: 

 fls. in the axils of the Ivs. or upper sessile bracts; 

 corolla 2-lipped, the upper lobes much narrower than 

 the 3 lower ones; tube of stamens free from the corolla: 

 seeds numerous, small, oblong to spindle-shaped, in a 

 very long linear caps, that bears at its apex the leafy 

 linear calyx-lobes and is dehiscent lengthwise by 1-3 

 valves or fissures. Six to 8 species, mostly in Calif. 

 (1 in Chile), usually in moist places and margins of 

 spring pools, sometimes in salty marshes or in moun- 

 tains. Rafmesque's name Bolelia (anagram of Lobelia) 

 is older, but is discarded by the list of "nomina conser- 

 vanda" of the the Vienna code. The plants are little 

 known in American gardens. They are easily grown 

 annuals, and are said to make interesting pot-plants. 

 The species are often not well distinguished, and some of 

 them may be color forms. The plants grow about 6 in. 

 high, and have been recommended for edgings. 



pulchella, Torr. (Clintbnia pulchella, Lindl.). Erect 

 or ascending, 2-10 in., usually simple: Ivs. oblong- 

 ovate to linear, J^in. long, obtuse: fls. deep blue, the 

 center of lower lip yellow with a white border, and 

 marked with violet and yellow in throat; lower lip 

 with 3 roundish apiculate lobes; upper lip deeply 

 2-cleft with spreading oblong-lanceolate segms. May, 

 June, in Calif. B.R. 1909. R.H. 1861: 171. G.W. 15, 

 p. 213. R.H. 1895, p. 19, shows its straggling habit 

 as a pot-plant. Many of the branches fall below the 

 top of the pot. 



elegans, Torr. (C. elegans, Douglas) . St. usually simple, 

 4-7 in.: Ivs. ovate to lanceolate: the broad lip moder- 

 ately 3-lobed; the 2 divisions of the smaller lip lanceo- 

 late, parallel; lower lip sky-blue with darker veinlets and 

 the main part white with 2 green or yellowish spots; 

 the throat often purple-spotted and yellow-lined. May. 

 Calif. B.R. 1241. L. H. B.f 



DOXANTHA CAPREOLATA, Miers: Bignonia capreolata. 



DRABA (Greek name for a cress). Cruciferae. WHIT- 

 LOW-GRASS. One of the important groups of spring- 

 flowering plants for the alpine garden. 



A large and widely scattered genus of tufted hardy 

 annual or perennial herbs, with stellate hairs: Ivs. often 

 in a rosette, mostly uncut: scapes or sts. leafy or not; 

 racemes short or long; fls. without bracts, small, white, 

 yellow, rosy or purple; stamens 6: fr. an oval, orbicular 

 or linear flat pod with several to many marginless 

 seeds in 2 rows in each cell; cotyledons accumbent. 

 Some 150 species in temperate and arctic regions of the 

 world, many of them in mountains. Many species 

 occur in the lists of alpine gardeners. They are more or 

 less alyssum-like. 



Drabas are very pretty dwarf compact alpine plants, 

 with small but numerous flowers admirably adapted 

 for the rockery or front part of a sunny border. They 

 require a sunny position and an open soil. It is impor- 

 tant that they be well matured by the autumn sun. The 



plant forms a dense little rosette of Ivs., and has a neat 

 appearance at all times. In spring, drabas are thickly 

 covered with their little flowers and when planted in 

 masses are decidedly effective. Propagation is chiefly 

 by division; also by seed, which may be sown in the 

 fall if desired. (J. B. Keller.) 



INDEX. 



aizoides, 7. cuspidata, 10. Mawii, 4. 



Aizpon, 8. Dedeana, 9. olympica, 11. 



alpina, 15. fladnizensis, 6. pyrenaica, 1. 



androsacea. 6. gigas, 5. rigida, 12. 



aurea, 16. hispida, 14. tridentata, 14. 



brunisefolia, 11. imbricata, 13. violacea, 2. 



bryoides, 12. lapponica, 6. Wahlenbergii, 6. 

 cinerea, 3. 



A. Fls. rose or purple. 



1. pyrenaica, Linn. ROCK BEAUTY. Height 2-3 in.: 

 Ivs. wedge-shaped, 3-lobed at apex: fls. white at first, 

 changing to rosy pink. May. Mts., S. Eu. B.M. 713. 

 Said to be easily prop, by cuttings. This is Petrocallis 

 pyrenaica, R. Br., under which name it will be found 

 again. 



2. violacea, DC. St. woody at base, branched: 

 6-12 in.: Ivs. obovate-oblong, obtuse, equally woolly 



1344. Draba Dedeana. 



on both sides: scapes leafy; petals obovate, dark purple. 

 Andes of Ecuador at elevations of 13,000-15,000 ft. 

 B.M. 5650. 



AA. Fls. white (sometimes yellowish in No. 6). 

 B. Plants biennial or annual. 



3. cinerea, Adams. St. nearly simple: Ivs. oblong- 

 linear, stellate pubescent: petals twice longer than 

 calyx : pods oblong, pubescent, shorter than the pedicel. 

 Early spring. Siberia. 



BB. Plants perennial. 

 c. Lvs. rigid. 



4. Mawii, Hook. Forming low, densely tufted, bright 

 green patches: st. much branched, densely clothed with 

 spreading, rosulate Ivs.: Ivs. linear-oblong, obtuse, 

 bristly, with a prominent midrib below: scape very 

 short, woolly, 2-4-fld., very short-pedicelled ; petals 

 thrice as large as the sepals, obcordate, white: pods 

 ellipsoid, compressed. Spain. B.M. 6186. 



5. gigas, Stur (properly Arabis Carduchbrum, Boiss.). 

 Lvs. rosulate and rigid, linear and obtusish, ciliate: 

 scape 1 in. or less, the fruiting raceme short and con- 

 tracted; fls. white: fr. glabrous, elliptic-linear, the style 

 very short, the valves 1 -nerved and keeled. Armenia. 



cc. Lvs. not rigid. 



6. fladnizensis, Wulf. (D. androsacea, Willd. D. 

 Wahlenbergii, Hartm. D. lapponica, Willd.). Plant 

 2-3 in., much branched at base: Ivs. rather loosely 

 rosulate, oblong-linear to lanceolate, ciliate, usually 

 somewhat villous or stellate-pubescent, less than J^in. 

 long: scape usually glabrous or only slightly villous; 

 fls. sometimes yellowish: pods elliptic-oblong to ovate- 

 lanceolate, not hairy. Arctic regions and Cent. Eu. 



