198 XXVII. GERANIACE^E. PELARGONIUM. 



ones are white, slightly veined, the 2 upper of a rich purple, almost black at 

 base. 



6. P. CORIANDRIFOLIUM. Coriander-leaved Geranium. St. herbaceous, bien- 

 nial, somewhat downy; Ivs. bipinnate, smooth, lobes linear, subpinnatifid. 

 Stem diffuse, If high. Distinguished by the finely divided leaves and large 

 flowers. The 2 upper petals much the largest, obovate, veined with purple ; 

 the 3 lower, of which the middle one is often wanting, are narrow and of a 

 pure white. 



* * * Leaves neither divided nor angular; stem fruticose. 



7. P. GLAUCUM. Glaucous-leaved Geranium. Very smooth and glaucous; 

 Ivs. lanceolate, entire, acuminate ; ped. 1 2-flowered. Stems 3f high, shrubby 

 and branched. The plant is remarkably distinguished by its leaves. Pedun- 

 cles axillary, with 1 or 2 elegant flowers. Petals obovate, of a delicate blush- 

 color, with red veins. 



8. P. BETULlNUM. Birch-leaved Geranium. Lvs. ovate, unequally serrate, 

 smoothish; stip. ovate-lanceolate; ped. 2 4-flowered. Stem shrubby, 3f high. 

 The plant is well named for its leaves. Flowers pale-pink, with deep red veins. 



9. P. ACETOSUM. Sorrel-leaved Geranium. Lvs. very smooth, obovate, crenate, 

 somewhat fleshy; ped. few-flowered; pet. linear. Stem shrubby, 3f high. 

 Named for the acid flavor of the leaves. Flowers pink. 



* * * * Leaves either angular or palmately lobed; stem fruticose. 



10. P. ZONALE. Horse-shoe Geranium. Lvs. cordate-orbicular, obsoletely 

 lobed, toothed, marked with a concentric zone. Stem thick, shrubby, 2 3f 

 high. One of the most popular of all the species. Leaves always marked 

 with a dark concentric stripe of various shades. The flowers are of a bright 

 scarlet, umbeled, on long peduncles. It has many varieties, of which the most 

 remarkable is 



/?. marginale; silver-edged, the leaves of which are bordered with white. 



11. P. iNQuiNANS. Scarlet Geranium. Lvs. round-reniform, scarcely divided, 

 crenate, viscid ; umbels many-flowered ; pet. obovate, cuneate. Justly admired 

 for the vivid scarlet of its numerous flowers. The name alludes to the reddish, 

 clammy moisture which stains the fingers in handling the soft, downy branches. 



12. P. PELTATUM. Ivy-leaved Geranium. Lvs. 5-lobed, entire, fleshy, smooth, 

 more or less peltate ; umbels few-flowered. Stem climbing, several feet in 

 length. Whole plant very smooth. A beautiful species, with umbels of very 

 handsome purplish flowers. 



13. P. TETRAGONUM. Square-stalked Geranium. Branches 4-cornered, fleshy ; 

 Ivs. cordate, bluntly lobed, somewhat toothed ; pet. 4, the upper ones pale-pink, 

 with crimson veins, the 2 lower small, white. Leaves small, rounded, notched, 

 with scattered hairs. 



14. P. GRANDIFLORUM. Large-lowered Geranium. Smooth, glaucous ; Ivs. 

 5-lobed, palmated, cordate at base, the lobes dentate towards the end ; pet. three 

 times as long as the calyx. Distinguished for the size and beauty of the 

 flowers', which are white, the 2 upper ones elegantly veined, and tinged with 

 red, larger than the rest. 



15. P. GRAVEOLENS. Rose-scented Geranium. Lvs. palmately 7-lobed, lobes 

 oblong, bluntly toothed, re volute, and very rough at the edge ; umbels many- 

 flowered, capitate. Nectary about half as long as calyx. Leaves very fra- 

 grant. Flowers purple. 



_ 16. P. RADULA. Rasp-leaved Geranium. Lvs. palmate, rough ; lobes narrow, 

 pinnatifid, revolute at edge, with linear segments ; umbels few-flowered ; nec- 

 tary nearly as long as the calyx. Distinguished for its large rough leaves 

 deeply divided.into linear segments, and with a mint-like fragrance. Flowers 

 purple. 



17. P. QUERCIFOLIUM. Oak-leaved Geranium. Lvs. cordate, pinnatifid, with 

 rounded recesses, lobes obtusely crenate ; branches and petioles hispid. Leaves 

 rough, often spotted. Flowers purplish. 



