ordek 22.— the purselanp:s. 1' 



5 L. corona'ta. Chinese L. Petals very broad, fringed witli numerous teeth, t 



6 L. Floscu'culi. Eagged Robin. Petals divided into 4 long teeth, crowned, t 



4. CERAS'TIUM. Mouse-ear. duckweed. 



Sepals 5, ovate, acute. Petals 5, bifid or 2-cleft. Stamens 10, some 

 times 5 or 4. Styles 5. Capsule cylindrical or roundish, opening at top 

 by 10 tooth-like valves. Seeds numerous. Fls. white, in cymes. (Fig. 114. 



Petals about as long as the caly.x. Plants hairy 1, 2 



Petals much longer than the calyx. Plants hairy or downy 3, 4, 5 



1 C. vulga'tum. Common M. Lvs. obovate. Sepals acute. Fls. at first crowded. 



2 O. visco'sum. Sticky M. Hairs sticky. Leaves lance-ovate. Sepals obtuse. 



8 C. arven'se. Field M. Lvs. linear. Kipe pods as long as the calyx. N. E. 



4 C. oblongifolium. Leaves lance-obl. Pods longer than calyx. M. 



3 C. nu'tans. Kodding M. Eipe pods curved, thrice longer than calyx. N W 



5. MOLLU'GO. Carpet-weed. 



Sepals 5. Petals 0. Stamens 3-5, opposite to the sepals. Styles 3. 

 Capsule 3-celled, 3-valved, many-seeded. — © Low or prostrate herbs, 

 with the leaves appearing whorled. 



M. verticilla'ta. Stems slender, jointed, much branched, lying flat on the ground. 

 At each joint stands a whorl of wedge-shaped or spatulate leaves of unequal 

 size, usually about 5 in number, and a few flowers, each solitary on its stalk, 

 wiiich is shorter than the petioles. Flowers small, sepals white inside. In dry 

 places. July-Sept. 



Order XXII. PORTULACACE^. The Purselanes. 



Tlerlys with thick, entire leaves, no stipules, and regular flowers ; 

 flowers with 2 sepals, 5 petals, open only in the sunshine ; 

 stamens opposite to the petals when of the same number, often more ; 

 pistils several, with their ovaries united, free, or half-free, forming iu 

 fruit a pyxis (§ 178) or a capsule. 



Analysis of the Genera. 



1[ Sepals five. Petals none. Fruit a pyxis. Stamens oo. Sta Purselane. Sesu'vicm. 



t Sepals 2. Petals 5 a 



a Stamens 5, opposite the petals. Spring Beauty. Clayto'ma. 1 



a Stamens 8-30, on the torus. Pod 3-vulved. Tali'm-m. 



a Stamens 8-30, on the calyx. Pyxis opening by a lid. Poktvla'cv. 2 



