30 CARYOPHYLLACES. 
6. ARENARIA, Linneus 
* 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.............0-+.+-++ 1, 2 
Petals about equaling the sepals: leaves pungent. .........-.0.seceeceeeeceees 3, 4, 5 
** The $ valves entire: annuals: bracts leaf-like. 
Much branched: leaves filiform, 3-12 lines long. ........ 0.00022. e eee ceeeneeeceee 6, 8 
Smooth: leaves lanceolate, obtuse, 1 or 2 lines long.......... 2.226 see e eee eee eee 9, 16 
Leaves linear to lanceolate 6-12 lines long............. cece eee e eee cceeeecesees 7, 11 
* °° Parts of the flower sometimes in 4’s: capsular valves bifid: leaves bright green, 1 or 2 
€RCRCB LONG aia seria sraciceaes pe eagee DUET ARERERSED RAR EER eee Ss 12, 13 
1. A. congesta, Nutt. Glaucous: flowers in dense fascicles: bracts broad. 
2. A. capillaris, Poir, Pubescent: flowers few: bracts small, lanceolate. 
8. A. pungens, Nutt. Stems 2 or 3 inches high, leafy, pubescent. Subalpine. 
4. A, Franklinii, Dougl. Stouter: sepals shining, margin scarious. Or. 
6. A. verna, Linn. Leaves erect, 2-3 lines long: sepals exceeding petala. 
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. Californica, Brewer. Sepals 3-nerved: Seeds rough. Cent. Cal. 
10. A. pusilla, Watson. Sepals l-nerved: petals minute or none: seeds smooth. 
ll. A palustris, Watson. Stems simple: leaves flacoid: few pedicels long. 
12, A. macrophylla, Hooker. Leaves acute, 3 or 4 pairs: petals obtuse. 
13, A. lateriflora, Linn. Leaves broader, obtuse: petals exserted. Or. 
7. SAGINA, Linnzus. 
1. 8. occidentalis, Watson. Slender: 2-6 inches high: pedicels straight. 
2. 8. Linnei, Presl. Densely matted: 1-2 in. high: fruiting pedicels curved. 
3. 8. crassicaulis, Watson. Stout, branched: leaves fleshy, scarious at base. 
8. SPERGULA, Linneus. 
1, 8° arvensis, L. Leaves filiform, smooth: sepals and petals equal. 
9. LEPIGONUM, Fries, 
L. macrothecum, F. & M. Pubescent: sepals and petals 3 lines long or mora. 
L. medium, Fries. More slender: flowers smaller, white. 
L. gracile, Watson. Annual, smooth, slender::sepals 4-1 line long. 
opm 
10. POLYCARPON, Linnezus. 
i BP. depressum. Nutt. An inch high: petals included, entire, 
