3544 



ZINGIBER 



ZINNIA 



4047. Commercial roots of 

 ginger, as seen in the stores. 



CXH) 



decorative plants. The shoots having a reed-like 

 appearance, they may often be used tc good advantage 

 in arranging plants for artistic effects. They are of the 

 easiest culture. Propagation is effected by division of 

 the rhizomes in spring. These should be potted in 

 fibrous loam to which a third of well-decomposed cow- 

 or sheep-manure has been added. Water should be 

 given sparingly until the 

 shoots have well developed, 

 when they should have an 

 abundance. They are also 

 benefited by an occasional 

 watering with weak liquid 

 manure water. Toward the 

 end of summer the shoots will 

 begin to mature, when the 

 water-supply should be dimin- 

 ished, and as soon as the 

 plants are ripened off the pots 

 may be stored either under 

 the greenhouse stages or in 

 some other convenient place, 

 where they should be kept 

 almost dry for the winter. 



A. Margins of Ivs. colored 

 creamy white or often pink. 

 Dfirceyi, Hort. ; also spelled 

 d'Arceyi and d'Arcyi. About 

 2-3 ft. high: Ivs. lanceolate, 

 6-8 x 2-2 2^> in., bright shining 

 green with a broad creamy 

 white or often pink margin 

 and oblique stripes of the 

 same color: fls. deep red, ball- 

 like. Intro, into Fla. This 

 species is not treated by 

 Schumann and is probably of horticultural origin. 



AA. Margins of Ivs. not colored. 

 B. Leafy st. different from the flowering st.: spike from 



the rhizome. 



Mioga, Roscoe. About 3 ft. high: Ivs. moderately or 

 shortly petioled, linear-lanceolate or nearly linear, 

 attenuate-acuminate and caudate at base, both sur- 

 faces glabrous, 10-15 x 1-2^ in-, membranaceous: 

 spike ellipsoidal, 2-3 J^ in. long: fls. white; calyx tubular, 

 acuminate; corolla-lobes lanceolate or oblong-lanceo- 

 late, lip obovate, entire, basal-lobes yellow; ovary 

 silky: caps, somewhat ovoid, 3-valyed. Japan. B.M. 

 8570. It is said to be still a saying in Japan that 

 those who eat this plant forget everything, although 

 no one has yet demonstrated it. 



BB. Leafy st. not differing from the flowering st.: spike 



terminal. 



c. Bracts green, often pale^margined, rotundate. 

 D. Lvs. grass-like, scarcely %in. broad: lip purple, 



yellow-spotted. 



officinale, Rosc9e. GINGER. Fig. 4047. Sts. normally 

 more than 3 ft. high from a tuberous rhizome: Ivs. ses- 

 sile, lanceolate or linear-lanceolate, attenuate-acumi- 

 nate at base, up to 8 in. long and scarcely %in. broad: 

 spikes ellipsoidal, obtuse, dense, 2 in. long; bracts ovate, 

 pale green, margins often yellow: calyx crenate; corolla 

 yellowish green, lobes lanceolate, acute, lip oblong- 

 ovate, purple, yellow-spotted, lateral lobes ovate, acute. 

 Native of Trop. Asia, but cult, throughout the tropics 

 and intro. into S. Fla. Gn. 26, p. 284. 



DD. Lvs. lanceolate or oblong-lanceolate: lip yettow. 

 Zerumbet, Roscoe. Sts. 12-20 in. high, stout, from a 

 tuberous rhizome : Ivs. densely aggregated, oblong-lan- 

 ceolate, acuminate, base acute, both surfaces glabrous 

 or scattered pilose beneath, 3^-6x2-2% in.: spike 

 subglobose, dense, 2-3 H in. long; bracts obtuse, pale 



green, margins pubescent (sometimes, at least when 

 older, red): calyx spathe-like, white; corolla-tube slen- 

 der, lobes lanceolate, white, lip short, broadly suborbi- 

 cular or subovate, pale yellow, tinted orange in the 

 center (sometimes red-spotted), lateral lobes short, 

 rotundate. India and Malaya. B.M. 2000. 



cc. Bracts red or at the beginning reddish green, later 



becoming obscurely red or rose, commonly acute. 



D. Spike elongated cylindrical, 8 in. or more long, apex 



obtuse. 



spectabile, Griff. Leafy sts. 6 ft. or more high, robust: 

 Ivs. subsessUe, oblong-lanceolate, acuminate at base, 

 obscurely green above, paler pubescent beneath, 8-12 

 x 33^ in.: spike 8-12 in. long, a little over 2 in. diam., 

 laxly cylindrical, apex rounded; bracts yellow, finally 

 scarlet, apex obtuse : corolla yellowish white, dorsal lobe 

 deep concave, broad, anterior narrower, linear-lanceo- 

 late, lip obovate, emarginate, 2-lobed, lemon-yellow, 

 apex almost black, lateral lobes half as long as midlobe, 

 ovate. Malay Penins. B.M. 7967. 



DD. Spike 4 in. or less long, elongated, narrow-fusiform, 



apex acute. 



cylindricum, Moon. Leafy sts. 6 ft. or more high: Ivs. 

 sessile, oblong-lanceolate or lanceolate, attenuate- 

 acuminate; base acute, glabrous above, puberulent 

 beneath, up to 8 x 2 Yi in. : spike 3J^ in. long, cylindrical, 

 narrowed at both ends, dense, bracts lower obtuse, 

 upper acute, pale or reddish; corolla-lobes lanceolate, 

 greenish, subequal, greenish, lip yellowish white, lateral 

 lobes small, obtuse. Ceylon. 



Z. cordllinum, Hance. Leafy sts. differing from the flowering, 

 almost 3 ft. high: Ivs. sessile, linear-lanceolate, glabrous above, 

 pilose beneath, 12x 2}^ in.: spike oblong, obtuse, 7 in. long, bracts 

 ovate, scarlet: corolla-lobes red, oblong, acuminate; lip obovate, 

 lateral lobes inconspicuous. China. Once offered in Fla. 



F. TRACY HUBBARD.! 



ZINNIA (Johann Gottfried Zinn, 1727-1759, pro- 

 fessor of medicine at Gottingen). Syn. Crasslna. Com- 

 posite. YOUTH- AND-OLD- AGE. Popular flower-garden 

 subjects for summer and autumn bloom, mostly annual 

 or treated as such. 



Annual, perennial, and subshrubby plants, mostly 

 Mexican but ranging from Texas and even Colo, 

 to Chile, probably 

 16-20 species: Ivs. 

 opposite, mostly 

 entire : heads termi- 

 nal, of fls. which are 

 peduncled or sessile: 

 rays pistillate, fertile, 

 disk yellow or purple, 

 its fls. hermaphro- 

 dite, fertile; involucre 

 ovate - cylindric or 

 campanulate, the 

 scales in 3 to many 

 series, broad, obtuse 

 or rounded, more or 

 less colored: achenes 

 laterally compressed, 

 2-toothed at the sum- 

 mit and frequently 

 1 - awned from the 

 inner angle, rarely 2- 

 awned. See the bo- 

 tanical revision by 

 Robinson & Green- 

 man in Proc. Amer. 

 Acad. Arts&Sci. 32: 

 14 (1897). Illus- 

 trated historical 

 sketch in Gn. 48, pp. 

 464, 465. 



The familiar zin- 

 nias (Figs. 4048-4050) 4048. Single zinnia. Z. elegans. 



