30 CARYOPnYLLACEiE. 



6. ARENARIA, Linnaeus. 



* The 3 valves of the capsule 2-cleft or parted: cespitose perennials with linear-subulate leaves 



and mostly scarious bracts. 



Petals exceeding the sepals; the capsule about equaling them 1, 2 



Petals about equaling the sepals : leaves pungent 3, 4, 5 



* * The 3 valves entire: annuals: bracts leaf -like. 



Much branched: leaves filiform, 3-12 lines long 6, 8 



Smooth: leaves lanceolate, obtuse, 1 or 2 lines long 9, 10 



Leaves linear to lanceolate 6-12 lines long 7, 11 



* * * Parts of the flower sometimes in 4's: capsular valves bifid: leaves bright green, 1 or 2 



inches long ., 12, 13 



1. A. congesta, Nutt. Glaucous: flowers in dense fascicles: bracts broad. 



2. A. capillaris, Poir. Pubescent: flowers few: bracts small, lanceolate. 



3. A. pungens, Nutt. Stems 2 or 3 inches high, leafy, pubescent. Subalpine. 



4. A. Franklinii, Dougl. Stouter: sepals shining, margin scarious. Or. 



5. A. verna, Linn. Leaves erect, 2-3 lines long: sepals exceeding petals. 



6. A, Douglasii, T. & G. Capsule globose: seeds flat, smooth. 



7. A. Howellii, Watson. Glandular-hispid, a foot high. Or. 



8. A. tenella, Nutt. Capsule oblong: seeds rough: sepals 3-nerved. Or. N. 



9. A. Calif ornica, Brewer. Sepals 3-nerved: Seeds rough. Cent. Cal. 



10. A. pusilla, Watson. Sepals l-nerved: petals minute or none: seeds smooth. 



11. A. palustris, Watson. Stems simple: leaves flaccid: few pedicels long. 



12. A. raacroph.ylla. Hooker. Leaves acute, 3 or 4 pairs: petals obtuse. 



13. A. lateriflora, Linn. Leaves broader, obtuse: petals exserted. Or. 



7. SAGINA, Linnseus. 



1. S. occidentalis, Watson. Slender: 2-6 inches high: pedicela straight. 



2. S. Iiinnaei, Presl. Densely matted: 1-2 in. high: fruiting pedicels curved. 



3. S. crassicaiilis, Watson. Stout, branched: leaves fleshy, scarious at base. 



8. SPERGTJLA, Linnseus. 

 1. S' arvensis, L. Leaves filiform, smooth: sepals and petals equal. 



9. LEPIGONUM, Fries. 



1. L. macrothecum, F. & M. Pubescent: sepals and petals 3 lines long or more. 



2. L. medium, Fries. More slender: flowers smaller, white. 



3. L. gracile, Watson. Annual, smooth, slender: sepals ^-1 line long. 



10. POLYCARPON, Linnaeus. 

 1. P. depressum. Nutt. An inch high: petals included, entire. 



