ILLUSTRATED FLORA 



VOL. Ill 



^c.aTn. 



Family 71. GERANlACEAE. 



Geranium Family. 



Herbs with alternate or opposite, palmately lobed or pinnate leaves, usually with 

 stipules. Flowers regular or slightly irregular. Sepals 5, rarely fewer, usually per- 

 sistent. Petals of the same number as sepals, hypogynous. Stamens as many or 2-3 

 times as many ; anthers 2-celled, versatile. Carpels 5, united about a central axis, 

 each 1-2-ovuled, indehiscent, at length elastically splitting away from below, and 

 beaked by the long style. 



About 12 genera and 470 species, natives of the temperate regions, most abundant in South Africa. 



Anther-bearing stamens 10; style-beaks glabrous on the inner surface. 1. Geranium. 



Anther-bearing stamens 5, alternating with S sterile filaments; style-beaks pubescent on the inner surface. 



2. Er odium. 



1. GERANIUM [Tourn.] L. Sp. PI. 676. 1753. 



Herbs with stipulate, palmately lobed, cleft or divided leaves and axillary 1-2-flowered 

 peduncles. Flowers regular, 5-merous. Sepals imbricated. Petals hypogynous, imbri- 

 cated. Stamens 10, generally 5 longer and 5 shorter. Style persistent, glabrous on the 

 inner surface, becoming recurved. Carpel opening along the inner face. [Name Greek, a 

 crane, from the long beak of the fruit.] 



About 190 species, widely distributed in temperate regions. Type species, Geranium sylvaticum L. 



Plants annual or biennial. 



Peduncle 1-flowered. 1. G. sibiricum. 



Peduncle 2-flowered. 



Sepals without subulate tips; seeds smooth. 



Stamens 10; carpel-bodies wrinkled, glabrous. 2. G. molle. 



Stamens 5; carpel-bodies not wrinkled, pubescent. 3. G. piisillum. 



Sepals with subulate tips; seeds reticulate or pitted. 



Style-beak and its branches less than 3 mm. long; fruiting pedicels about equaling the calyx. 



Seeds deeply reticulate; carpel-bodies short-hirsute with spreading hairs. 



4. G. dissectum. 



Seeds finely reticulate; carpel-bodies long-villous with ascending hairs. 



5. G. carolinianuni. 



Style-beak and its branches more than 4 mm. long; fruiting pedicels much longer than the calyx. 

 Peduncles appressed-pubescent or with retrorse glandless hairs. 6. G. cohimbinum. 



Peduncles glandular-pubescent with spreading hairs. 7. G. Bicknellii longipes. 



Plants perennial from taproots or rootstocks. 



Petals less than 1 cm. long; stems rather densely and retrorsely pubescent, not glandular. 



8. G. retrorsum. 

 Petals over 1 cm. long. 



Petals glabrous except for the cilia at base; free tips of styles 1-2. S mm. long; fruiting pedicels erect 



and straight. 9. G. oreganiim. 



Petals pilose on the lower one-fourth to one-half of the inner surface; fruiting pedicels spreading or 

 reflexed and ultimately bent upward. 

 Petals pilose on the lower one-fourth of inner surface; stems stout. 



Lower part of stem and petioles of basal leaves glandular-villous with an indument of short 



glandular pubescence. 10. G. viscosissimum. 



Lower part of stems and petioles of basal leaves strigose or retrorsely pubescent with short 

 whitish nonglandular hairs. 11. C nervosum. 



Petals pilose on the lower one-half of the inner surface; stems slender. 



Free tips of styles 3-4.5 mm. long. 12. G. Richardsonii. 



Free tips of styles 6-9 mm. long. 13. G. calif ortiicum. 



1. Geranium sibiricum L. Siberian Geranium. Fig. 2963. 



Geranium sibiricum L. Sp. PI. 683. 1753. 



Annual, the stems 3-10 dm. long, decumbent or ascending, freely branched, whole plant villous- 

 pubescent. Leaves nearly orbicular, 5-7 cm. broad, deeply 3-5-parted; divisions broadly lanceo- 



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