1330 



GEONOMA 



GERANIUM 



cc. Blade S-2}/^ ft.; petiole 4 in. long. 

 elegans, Mart., var. robusta, Drude. St. 6-10 ft. 

 high, 3— i lines diam.: segms. rarely 3, usually 5-7, 1- 

 nerved, 10-14 in. long, some 4 lines wide, intermixed with 

 broader, many-nerved ones, all long, f alcate-aeuminate : 

 spadix about 10 in. long, the fls. very small, inserted in 

 deep pits. Cent. Brazil. 



BBB. Lf.-segms. all alike {except the connivent apical ones). 

 c. Alternate, remote, linear, scurfy. 

 Riedeliana, Wendl. (G. gracilis, Lind. & Andre, 

 the oldest and perhaps the correct name). Habit of 

 Cocos Weddelliana, the whole plant sparsely covered 

 with caducous, brown, shining scales: petiole slender, 

 l}-2 ft. or more long, terete below, flattened above; 

 rachis triangular, bisulcate above: Ivs. spreading, 

 drooping at the apex; segms. 10-12 in. long, about 9 

 lines wide, linear-acute, elegantly recurved, the 2 

 terminal ones connivent: fls. showy, vellow, in long 

 drooping spadices. Brazil. I.H. 21:169. B.M. 7963. 



cc. Equidistant: petiole half as long as the blade. 



Schottiana, Mart. St. 9-15 ft. high, 1-1 J<i in. thick: 

 Ivs. long-stalked, gracefully recurving; petiole half or 

 more than half as long as the blade; segms. about 35 

 on each side, 10-12 in. long, ^sfn. wide, equidistant, 

 linear or Unear-lanceolate, very long-acuminate, 

 recurved at the tip: spadix about 10 in. long, the stalk 

 about 1 ft. long. E. Brazil. — A very variable species. 



The following are imperfectly described, but are in the trade: 

 G. imperidlis, Lind. G.W. 2, p. 37. — G. princeps, Lind. — G. 

 Pyn^rtiana, Hort. Belongs under a. One of the smallest Ivs. meas- 

 ures 2S in. long by 10 in. at the broadest. Has not flowered yet, 

 and the genus is therefore uncertain. R.H. 1898, p. 262. G.C. III. 

 23:258. F.E. 10:S8fi. G.W. 2, p. 446.— G. specidsa, Barb.-Rodr. 

 G.W. 2, p. 431. — G. Swdrtzii, Griseb. {Calyptrogyne Swartzii, 

 Hook. Calyptronoma Swartzii, Griseb.). Trunk 50-60 ft. high, 

 smooth: lf.-segms. Unear-acuminate, green, glabrous. Cuba. 



N. TAYLOR.t 



GEORGINA. A synonym of Dahlia, which still 

 survives in the form of "Georginen," the popular name 

 of dahhas in Germany. 



GERANIUM (Greek, crane; from the resemblance of 

 the fruit to a crane's bill). Geraniacex. Crane.sbill. 

 Generally herbaceous plants, annual, biennial, and per- 

 ennial. Widely cultivated in borders, and some species 

 in the rockery, usually caulescent. 



Leaves simple, alternate or opposite and much- 

 lobed, sometimes almost radical: fls. regular; sepals 5, 

 imbricated, often 3-nerved and mucronate; petals 5, 

 often hairy or cihate; stamens 10, in 2 rows; anthers 

 10; seeds when ripened separated from the ovary and 

 with its awn bent sinuously. The genus Erodium, its 

 nearest ally, has but the inner row of stamens furnished 

 with anthers and the awn of the seed is bent spirally. 

 The geraniums of common speech are classed in the 

 genus Pelargonium, having at the side of the pedicel a 

 distinct narrow tube and zygomorphic fls. — The genus 

 Geranium has over 250 species, found in the temperate 

 zones particularly of the northern hemispheres, very 

 few in the tropics. The roots of some, as G. maculatum, 

 find use in medicine on account of their astringency. 

 Thrive well in ordinary garden soil, and are propagated 

 by seeds and divisions of roots. The best botanical 

 account is that of R. Knuth in Engler's Das Pflanzen- 

 reich, hft. 53 (1912), and by SmaU and Hanks in N. 

 Amer. Flora, Vol. 25, 1907, for the N. American spe- 

 cies. A beautifully illustrated account of the genus is 

 by Sweet (1820-30) in which special stress is laid on 

 cultivation. There are 500 colored plates, and, where 

 possible, these are cited in the following account, thus, 

 S. 197.=Sweet, Geraniacese, plate 197. 



Large masses of native species such as G. maculatum 

 and G. Robertianum can be eifectively naturalized 

 under bushes and trees. They spread very rapidly 

 and in the case of G. Robertianum will be profuse 

 bloomers nearly all summer. 



INDEX. 



aconitifolium, 10. Fremontii, 12. platyanthum, 18. 



album, 13, 15, 16. grandifiorum, 20. platypetalum, 13, 



anemonifolium, 3. Grevilleanum, 25. pleniun, 10. 



argenteum, 6. ibericum, 13. -pratense, 15. 



armenum, 14. inciaum, 17. prostratum, 11. 



Bachhousianum, 14. lancastriense, 11, Richardsonii, 9. 



canaHense, 3. Londesii. 24. Robertianum, 1. 



cinereim, 7. macrorridzum, 5. aanguineum, 11. 



collinum. '?l maculatum, 16. aibiricum, 19. 



endreaaii, 22. malvaeflorum, 4. subargenteum, 7. 



erianthum, 17. nepalenso, 21. Traversii, 2. 



erioatemon, 18. pheeum, 8. Wallichiamim, 23. 

 flore-pleno, 15. 



KEY TO THE SPECIES. 



A. Plants annual, more or less prostrate: 



fes. finely dissected 1. Robertianum 



AA. Plants perennial. 



B. Species fender, to be grovm only in 

 greenhouse northward. 



c. Foliage silvery canescent 2. Traversii 



cc. Foliage glabrous, at least neoer 



canescent 3. anemonifo- 



BB. Species hardy. [lium 



c. Tuberous-rooted 4. malvaeflorum 



cc. Not tuberous-rooted. 



D. Plant with a thickened woody 



base 5. macrorrhi- 



DD. Plants without thickened woody [zum 



base. 

 E. Foliage silrery-canescent. 



F. Usually 1-fld 6. argenteum 



FF. Usually 2-fid 7. cinereum 



EE. Foliage or whole plant glabrous 

 or pubescent, but not silvery. 

 F. Sis. erect. 



G. Fls. dark blue, almost black. 8. phfeum 

 GG. Fls. not dark blue, some- 

 times light blue. 

 H. Color of fls. while (see 

 also white-fld. forms of 

 Nos. IS, IB, and 16). 



I. Lvs. S-5-parted 9. Richardsonii 



II. Lvs. 7-parted 10. aconitifolium 



HH. Color of fls. not white. 



I. Mostly 1-fld 11. sanguineum 



II. Mostly more than 1-fld. 

 J. The St. branched. 

 K. Fls. rose-purple. ... 12. Fremontii 



KK. Fls. violet 13. ibericum 



jj. The sts. essentially 

 simple. 

 K. Lobes of the lvs. 

 more or less 



rounded 14. armenum 



Kx. Lobes of the lvs. 

 ovate or lanceolate. 

 L. Pedicels recurved 



in fr 15. pratense 



LL. Pedicels erect in 

 fr. 

 M. The pedicels not 



glandular 16. maculatum 



MM. The pedicels 

 glandular. 

 N. Lvs. finely cut. 17. incisum 

 NN. Lvs. 5-lobed...lH. eriostemon 

 FF. iS(s. decumbent or creeping, 

 scarcely erect. 



G. Peduncles 1-fld 19. sibiricum 



GG. Peduncles 2- or more-fid. 

 H. Petals about as long as the 

 sepals. 



I. Fls. pale lilac 20. grandifiorum 



II. Fls. rose-purple 21. nepalense 



HH. Petals 1-2 times the 

 length of the sepals. 



I. Upper lvs. S-lobed 22. Endressii 



n. All the lvs. B-lobed. 



J. The petals striped 23. Wallichia- 



33. The petals not striped, [num 



sometimes spotted. 

 K. Base of petals ciliate.24. collinum 

 KK. Base of petals pilose 



or glabrous 25. Grevilleanum 



