MACLOSKIE: CARYOPHYLLACE^E. 383 



c. Exstipulate. 



d. Petals deeply 2-cleft ; rarely none. 



e. Capsule subovoid, dehiscing by valves. Styles 3 (4-5), antisepalous. 



4. Alsine (Stellaria), p. 385. 

 e2. Capsule cylindric, dehiscing by teeth. Styles as many as, and opposite, sepals. 



5. Cerastium, p. 387. 

 d2. Petals entire, or nearly so ; rarely none. 



e. Gynecium isomerous (or pliomerous). 



f. Petals often none or short. Stamens isomerous and episepalous, or diplo- 



merous. Minute plants. 6. Sagina, p. 390. 



/2. Petals none. Stamens isomerous but alternisepalous. 



7. Colobanthus, p. 390. 



<r2. Gynecium oligomerous, I -celled. Carpels usually more than 2. Seeds many. 

 /. Carpels with as many teeth as the styles. Disk thick, lobed. Maritime 



plants. 8. Ammodenia, p. 393. 



_/2. Carpels with twice as many teeth as the styles. Disk annular. 



9. Arenaria, p. 393. 

 c2. With scarious stipules. Carpels and styles 3. (Tissa, Spergularia.') 



IO. Buda, p. 395. 

 ^3. With stipules. Leaves 4- ranked. Calyx-lobes, stamens and staminodes each 4. 



Ovary i -celled, i-ovuled. 14. Philippiella, p. 397. 



b2. Fruit an achene, I -seeded. Stamens perigynous. 

 c. Leaves stipulate. 



d. Embryo curved. Sepals awn-tipped. Stamens 5 (3-4). Style filiform, 2-cleft. 



Petals hair-like. n. Paronychia,^. 396. 



d2. Embryo straight. Sepals ending in a stout spine. 13. Acanthonychia, p. 397. 

 </3. Small, sessile leaves, with small, green flowers in axillary clusters. 



12. Herniaria, p. 396. 



c2. Leaves exstipulate. Calyx 4~5-lobed. Stamens I-IO. Styles 2, distinct. 



Scleranthus. 



i. SILENE Linn. Campion. 



Calyx synsepalous, 5-toothed ; not bracted at base. Petals 5, narrow, 

 clawed. Stamens 10. Styles mostly 3; capsitles 6- or 3-toothed. 

 Species 250, widely distributed. 



i. S. ANTIRRHINA Linn. 



Annual, nearly glabrous. Stem erect, branching, leafy. Leaves oblan- 

 ceolate, acute, subciliate, the upper narrower and smaller. Flowers small, 

 on filiform pedicels, paniculate. Calyx narrow-ovoid, its teeth ovate. 

 Petals obcordate, crowned. 



(In E. United States); N. Patagon. by Carmen. 



