OP THE WASATCH REGION 21 



3. ARENARIA. Sandwort. 



Mostly low and tufted. Leaves sessile; often rigid and 

 subulate. Flowers white or sometimes tinged with pink; in 

 cymes, panicles or sometimes capitate. Sepals 5. Petals 5 or 

 none. Stamens 10. Styles usually 3. Capsules globose or 

 oblong. 



1. A. nintahensis A. Nelson. Perennial from a much-branched 

 caudex; caespitose. Leaves chiefly basal on the crowns; fas- 

 cicled; needle-shaped. Stems slender, erect, few-leaved. Cyme 

 loose. Sepals narrowly ovate, acute, scarious. Petals obtuse. 

 Capsule slightly shorter than the styles. In crevices of rocks 

 on mountain-slopes, usually in exposed situations. June-July. 



4. STEL-L.ARIA. (Alsine.) Chickweed; Stitchwort. 



Low annuals, often with 4-sided stems. Leaves exstipulate; 

 sessile or rarely petioled. Inflorescence cymose or solitary. 

 Sepals free to the base, or nearly so. Petals white. Stamens 

 10 or less. Styles usually 3. Fruit an ovate or oblong straight 

 capsule, which in discharging its seeds splits to the base. 



Lowest leaves petioled 1. S. nitens 



Leaves all sessile 2. S. longipea 



1. S. nitens Nutt. (Alsine nitens (Nutt.) Greene.) Erect 

 with very slender stems (3-7 inches high); glabrous or slightly 

 hairy below. Leaves linear, acute; sessile or the lowermost 

 contracted into slender petioles. Inflorescence strict with erect 

 pedicels, or the flowers sessile. Petals half as long as the 

 sepals, or sometimes wanting. Capsules oblong, almost as 

 long as the calyx. Dry gravelly meadows. May. 



2. S. longripes Goldie. (Alsine longipes (Goldie) Coville.) 

 Starwort. Stems weak; erect or decumbent; very slender; 6-10 

 inches high. Leaves linear-lanceolate, somewhat keeled, light- 

 green. Inflorescence terminal, dichotomously forked; few- 

 flowered; with small, papery bracts. Capsule ovoid, longer 

 than calyx; on erect pedicels. Shaded or wet places. May- 

 August. 



5. CERASTITJM. Mouse-ear' Chickweed; Powder-horn. 



Pubescent or rarely glabrous herbs with dichotomous cymes 

 of white flowers. Sepals 5, or sometimes only 4. Petals (if 

 present) as many as the sepals. Stamens 10 or rarely less. 

 Styles 5 or rarely 4. Capsule cylindrical; dehiscing by 8-10 

 apical teeth. 



1. C. brnchypodum Robinson. A viscid-pubescent annual, 

 3-10 inches high. Lower leaves spatulate or oblanceolate. nar- 

 rowed into a petiole; upper linear to lanceolate, sessile. Petals 

 longer than the sepals. Pedicels in fruit 1-3 times the length 

 of the calyx; .-straight or nearly so. Capsules 2-3 times the 

 length of the calyx. Among blue-grass in lawns. May-Sept. 



