STANDLEY — FLOKA OF GLACIER PARK. 337 



6. MOEHRINGIA L. 



1. Moehringia lateriflora (L.) Fenzl. Frequent at low or sometimes at middle 

 altitudes, in moist woods or thickets. Alaska to Oreg., N. Mex., N. J., and Lab.; 

 also in Eur. and Asia. {Arenaria lateriflora L.)— Perennial; stems slender, 10 to 20 

 cm. long, tufted, minutely hairy; leaves oval to oblong, 1 to 3 cm. long, mostly 

 obtuse; flowers while, axillary or in cymes; sepals obtuse; petals 4 to 5 mm. long, 

 longer than the sepals; seeds black and shining, with a small pale appendage. 



7, ARENARIA L. Sandwort. 



Perennials, often tufted or matted; leaves linear or needle-like; flowers in cymes 

 or often solitary; petals 5, white; stamens 10; capsule opening by 3 valves, these 

 often 2-cleft. 



Stems glabrous 1. A. rossii. 



Stems finely glandular-hairy. 

 Sepals acute. 

 Sepals 3 mm. long, 3-nerved; petals usually longer than the sepals. 



2. A. propinqua. 

 Sepals4to5mm. long, 1-nerved; petals shorter than the sepals . . 3. A. nutt&llii. 

 Sepals obtuse. 

 Leaves mostly 2 to 10 cm. long; stems usually with numerous flowers; valves of 



the capsule 2-lobed 4- A. formosa. 



Leaves 2 to 6 mm. long; stems with 1 to 4 flowers; valves of the capsule entire. 

 Sepals glabrous or minutely puberulent; capsule 4 to 6 mm. long. 



6. A. sajanensis. 

 Sepals with short but slender gland-tipped hairs; capsule 6 to 8 mm. long. 



6. A. laricifolia. 



1. Arenaria rossii (Richards.) R. Br. Common above timber line, especially on 

 rock slides. Alaska to Wash, and Colo. (Alsinopsis rossii Rydb.)— Stems 1 to 5 cm. 

 high, tufted; leaves 4 to 8 mm. long, linear; flowers usually solitary; sepals 3 mm. 

 long, acute. 



2. Arenaria propinqua Richards. Frequent at nearly all altitudes, especially 

 above timber line, in meadows or moist thickets, along creek beds, or on open slopes 

 or rock slides. B. C. to Calif., N. Mex., and Mack. (Alsinopsis propinqua Rydb.)— 

 Stems 3 to 10 cm. high, very slender, loosely branched and tufted; leaves very 

 slender, 5 to 10 mm. long. 



3. Arenaria nuttalUi Pax. Frequent above timber line, on rock slides or exposed 

 summits or in meadows. B. C. to Calif., Wyo., and Alta. (Alsinopsis occidentalis 

 Heller.)— Stems 10 to 15 cm. high, loosely matted; leaves ascending, sharp-pointed, 

 6 to 12 mm. long, very viscid. 



4. Arenaria formosa Fisch. Grass sandwort. Common at nearly all altitudes 

 but most abundant above timber line, in meadows or on open slopes or rock slides. 

 B. C. to Calif., Utah, and Alta.— Stems 10 to 20 cm. high, densely tufted; leaves 

 grasslike, mostly basal; petals 6 to 9 mm. long, much longer than the sepals. 



A rather conspicuous plant. 



5. Arenaria sajanensis Willd. Frequent above timber line, in meadows or on rock 

 slides. Alaska to Oreg., Ariz., Alta., Que., and Greenl.; also in Asia.— Stems 2 to 5 

 cm. high, usually forming dense mats; petals equaling or slightly longer than the 

 sepals; seeds not beaked. 



6. Arenaria laricifolia L. Frequent at high and middle altitudes, in meadows or 

 on rock slides or open slopes; sometimes found at low altitudes in exposed places 

 Yukon to Oreg. and Wyo. ; also in Eur. and A.sia. (Alsinopsis laricifolia Heller.)— Stems 



