il 



equal. Corolla regular, deciduous ; the limb plaited, 4 — 5- 



* 



the brae teas. 



4. 



280 LViii. coxvoLvuLACE^. ^Convolvulus. ^ ''''^^ 



Hill, Ireland, %, G, 7. — Stem 1 — 2 ft. high, angular. Flowers A I' 



large, blue, sometimes white. 



■■''] 1) 



el 



t 





Ord. LVIIL C0XV0LVULACE2E Ji^^,?. J / 



Calt/x of 4 — 5 sepals, permanent, imbricated, often very un- fl i^^^' 



lobed. Stamens 4 — 5 from the base of the coi^olla. Ovary "vvltU 



2 — 4 cells, seldom 1, sometimes in 2 or 4 divisions, few-ovuled 



ovules solitary in each cell or collateral. Style I, often divided ^^ 



rarely 2. Disk annular, hypogynous or wanting. Capsule 1 — 4- 



celled, the valves fitting at their edges to the angles of a loose S^^ 



dissepiment, bearing the seeds at the base, or bursting trans- (rf"^'' 



versely. Albumen in small quantity, mucilaginous. Emhi^yo ' \w 



curved. Cotyledons plaited. — Herbs or Shrubs, generally 



climbing^ milhj^ and purgative. Scammony is the product of 



Convolvulus Scammonia: Jalap^ of Exogonium pm^gans. The ! ft/, ^ 



Sweet Potato^ a most valuable esculent root of the tropics and 1 Jyl 



warm climates, is the Batatus escidenta, Cuscuta has no leaves, 



and is parasitical. 



1. Convolvulus. Calyx not inclosed within bracteas. Capsule 2- f"*''"'^ 

 celled, 2-valved. Stems leafy, ■ \\i\t i 



2. Calystegia. Calvx enclosed within 2 bracteas. Capsule 1-ceIled, ' -irrfld 

 2-valved. Stems leafy. ' > um^ 



3. Cuscuta. Calyx not inclosed within bracteas. Capsule bursting J !■''' 

 transversely at the base. Leaves none; \ jgiile,&l 



1. Convolvulus Zmn. Bindweed, 1 ''scales £ 



Paiasit 



Cat 5-sepaled, without external bracteas. Cor. campanulate. 

 Style 1. Stigmas 2, linear, cylindrical. Ovary 2-celled, 4- 

 ovuled. Caps. 2-celled, 2-valved —.Famed from convolvo, to 



entwine ; whence comes, too, the English name Bindweed, I ^^^^^' 



fl Win mW^ 



1. Q arvensis L. {small B.) ; stem climblnir, leaves sa^-'ittate, | Jvoi 



their lobes acute, peduncles mostly single-flowered, bracteas ■ ,. 



mmute distant from the flowers. E. B. t. 312: I ,":,' 



Corn fields, hedges, &c., especially in a liglit soil, ir. 6,7.— 1! ^ (]„ 



I 



_ Flowers rather small, rose-coloured. Root running very deep into 

 ^ the ground, and difficult of extirpation. 



2. Calystegia R. Br. Calystegia. Hooded Bindweed. 



Cal 5-sepaIed, in'closed within two large opposite bracteas. . 



Cor. campanulate. Style 1. Stigma 2.1obed ; lobes oblon-, \\ 



cyhndncal, or flattened. Ovary, sometimes 2»celled at the base, 

 1-celled towards the apex, 4-ovuled. Ca;>.9. 2-valved, l^celled, 

 — x^o.^'.o . >^^^\oc^ beautiful^ and <t7£7//, a coveri 







