340 



PAPIUONACEAE. 



[VOL. II. 



i. Vigna Sinensis (L.) Endl. Cow Pea. China Bean. Black-eyed Bean. 



(Fig. 2238.) 



Dolichos Sinensis "L,. Cent. PI. 3: 28. 1756. 

 Dolichos Catjang L. Mant. i: 269. 1767. 

 Vigna Catjang Walp. Linnaea, 13: 533. 1839. 

 Vigna Sinensis Endl. ; Hassk. PI. Jav. Rar. 386. 1848. 



Annual, glabrous, or somewhat pubescent; stem 

 twining or trailing, striate. Stipules ovate or ovate- 

 lanceolate, acuminate, prolonged backward, 3"- 

 io // long; petioles stout, often as long as the leaf- 

 lets or longer; terminal leaflet rhombic ovate, 

 acute or blunt, 2 / -6 / long, often about as wide, 

 long-stalked; lateral leaflets very obliquely ovate 

 and inequilateral, about as large as the terminal 

 one, short-stalked; flowers few near the knotty ends 

 of the long peduncles, yellowish, 8 // -io // long; 

 pod fleshy, 4 / -7 / long, $"-%" thick, nearly straight; 

 seeds with a dark circle around the scar of attach- 

 ment. 



Escaped from cultivation, Missouri to Texas and 

 Georgia. Native of Asia, and called Chowley, Tow- ' 

 cok. Seeds edible. July-Sept. 



Family 50. GERANIACEAE J. St. Hil. Expos. Fam. 2: 51. 1805. 



GERANIUM FAMILY. 



Herbs with alternate or opposite leaves, and axillary solitary or clustered 

 perfect regular flowers. Stipules commonly present. Sepals 5 (rarely fewer), 

 mostly persistent. Petals of the same number, hypogynous. Stamens as many 

 as the sepals, or 2-3 times as many, distinct; anthers 2-celled, versatile. Ovary 

 i, usually 5-lobed and 5-celled; ovules i or 2 in each cavity. Fruit capsular. 

 Embryo straight or curved; cotyledons flat or plicate. 



About 10 genera and 450 species, natives of temperate regions, most abundant in South Africa. 



Anthers 10, rarely 5; carpel-tails not hairy inside. 

 Anthers 5; carpel-tails bearded inside. 



1. Geranium. 



2. Erodium. 



i. GERANIUM L. Sp. PI. 676. 1753. 



Herbs with stipulate palmatcly lobed, cleft or divided leaves, and axillary i-2-flowered 

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

 imbricated. Stamens 10 (rarely 5), generally 5 longer and 5 shorter. Ovary 5-lobed, 5- 

 celled, beaked with the compound style. Ovules 2 in each cavity. Capsule elastically 

 dehiscent, the 5 cavities i-seeded and long-tailed by the persistent style-divisions which are 

 naked on the inner side. [Greek, a crane, from the long beak of the fruit.] 



About 170 species, widely distributed in temperate regions. Besides the following, some 6 

 others occur in western North America. 



Perennial; flowers i' broad or more. 

 Annuals or biennials; flowers 2" -6" broad. 



Leaves 3-divided; segments pinnatifid, thin. 

 I<eaves pedately lobed or dissected. 

 Peduncles i -flowered. 

 Peduncles 2-flowered. 



Peduncles longer than the leaves; carpels smooth and glabrous. 

 Peduncles short; carpels rugose or hairy. 

 Seeds reticulated or pitted. 



Glandular-pubescent with long white hairs. 

 Pubescent with short hairs; leaves deeply lobed. 

 Flowers pale purple ; seeds minutely reticulated. 

 Beak short-pointed; inflorescence compact. 

 Beak long-pointed; inflorescence loose. 

 Flowers deep purple ; seeds deeply pitted. 

 Seeds smooth or nearly so. 



Stamens 5; carpels hairy, not rugose. 

 Stamens 10; carpels glabrate, rugose. 



1. G. maculalum. 



2. G. Robertianum. 



3. G. Sibiricum. 



4. G. columbinum. 



5. G. rotundifolium. 



6 G. Carolinian um. 

 G. Bicknellii. 

 G. disseclum. 



G. pusillum. 

 G. molle. 



