154 XVI. CAHYOPHYLLEiE. 



genera and species, whether indigenous or introduced^ are all European or East-Mediler- 



raueaa. 



Tribe T. Sileuese. — Sepals united in, a 4- or h-toothed calyx. Petals and stamens 

 7i]/pogynous^ often raised on a stalk-like torus. Styles distinct from the base. Stij}ules 0. 



Calyx many-nervedj with 2 or more bracts at the base. Styles 2. 



Seeds ilat. Embryo straight Dianthus (p. U6). 



Calyx broadly or obscurely 5-nerved. Styles 2 1. GYFSorniLA. 



Cal3x lO-nerved. Styles 3 2. Silkne. 



Calyx 10-nerved. Styles 5 Lychnis (p. 156). 



Tribe II. Alslnem,— Sepals free or only united hy the disk at their base. Tetals 

 and stamens hypogyvous or slightly perigynous, the torus not elongated. Styles distinct 

 from the ba^e. Stipules 0, or rarely small and scarious. 



Petals usually 2-cIert. 



Capsule cyliudrical or conical, opening equally in twice as many 



teeth as styles. Styles 5, opposite the sepals, or rarely 4 or 3 , 3. CerastiuM. 



Capsule globular or ovoid, opening in as many 2-cleft valves as 



styles. Styles 3j or if 5, alternate with the sepals . , , , 4. Stellauia. 



Petals entire or none. 



Sepals 5. Styles usually 3. Capsule globular or ovoid. 



No stipules. 



Petals white, entire ^ . Akenarta (p. 159). 



Petals none * . 4. Stellaria. 



Stipules small and scarious. Petals pink 7. Spergulauia, 



Sepals, styles, and capsular valves 4 or 5. 



No stipules. Leaves opposite. 



Stamens twice as many as sepals, or if of the same number, 



opposite to them 5. Sagtna. 



Stamens of the same number as the sepals and alternate 



with them 6. Colobantiius. 



Stipules small and scarious. Leaves clustered so as to appear 

 verticillate . . , Speegula (p. 161). 



TaiBE^IIL Polycarpeae. — Sepals of Alsinese. Petals usually very small or none. 

 Stamens 5 orfeicer, hypogrjnous or slightly perigynous. Style single at the base^ with 3 

 or 2 branches or miuide teeth. Stipules scarious or very minute. 



Petals lobed. Style very short. Stipules minute 8. Drymaria. 



Petals entire. Style short. Stipules scarious 9. PolycarpoX. 



Petals entire or notched. Style elongated. Stipules and sepals 



scarious .,.,,,/.., 10. Polycarp^a. 



Tribe I. Silkke^e.— Sepals united in a 4- or 5-toothed calyx. Petals and 

 stamens hypogynous, often raised oif a stalk-like torus. Styles distinct from 

 the base. Stipules none. 



1. GYPSOPHILA, Linn. 



Calyx campanulate or turbinate-tubular, 5-tootlicd or 5-lobed, broadly 

 5-nerved, membranous between the nei-ves. Petals 5, with a narrow claw, 

 and without any scale. Torus small. Stamens 10, Styles* usually 3- 

 Capsule globular or ovoid, opening to the middle or lower down in 4 valves. 

 Seeds nearly reniform; embryo curved round the albumen. — Herbs, mostly 

 glaucous, sometimes glandular or hirsute. Flowers usually small, uuraerous, 

 and paniculate, or solitary in the forks of the stem. 



