PRIMULACEAE. 285 



Androsace filiformis Retz. Glabrous annual; leaves basal in a rosette, 

 ovate, obtuse, entire or denticulate; scapes 2-10 cm. high; bracts of the in- 

 volucre subulate; pedicels capillary, 1-2 cm. long; calyx globose in fruit, the 

 lobes triangular; corolla white, longer than the calyx; capsule globose. 



In wet places, Forest Grove, Oregon, Marsh. 



391. TRIENTALIS. STAR-FLOWER. 



Low smooth perennials, with simple erect stems; leaves few, 

 alternate, mostly clustered at the summit of the stem, the lower 

 ones reduced to scales; peduncles several, slender, each bearing 

 a solitary flower; corolla rotate, y-parted, rarely 5-, 6- or 8- 

 parted; filaments slender, united at the base; anthers oblong, 

 recurved after dehiscing; style filiform; ovary free; capsule few- 

 seeded. 



Leaves acute, clustered at top. T. latifolia. 



Leaves obtuse, scattered along the stem. T. arctica. 



Trientalis latifolia Hook. Stems 10-30 cm. high, from small rather deep- 

 seated tubers; leaves 4-7, whorled near the top, lanceolate to oblong-oval, 

 acute, 3-8 cm. long, short-petioled; pedicels very slender, shorter than the 

 leaves; corolla lobes pink, lanceolate, acuminate. 



In woods, very common. 



Trientalis arctica Fisch. Stems 5-10 cm. high, with scattered obtuse or 

 retuse leaves; corolla nearly white. 

 In cranberry bogs, not rare. 



392. GLAUX. 



Low leafy fleshy perennials; leaves opposite, entire, sessile; 

 flowers sessile, solitary-axillary; calyx bell-shaped, 5-cleft, the 

 lobes ovate or oblong, petal-like; corolla none; stamens 5, on the 

 base of the calyx, alternate with its lobes; capsule 5-valved, few- 

 seeded. 



Glaux maritima L. Glabrous and glaucous, 8-20 cm. high, usually erect; 

 leaves oblong or ovate, fleshy, mostly opposite, 4-12 mm. long; flowers in the 

 axils, pink. 



On the seashore, common. 



393. ANAGALLIS. PIMPERNEL. 



Low spreading annual herbs; leaves opposite or whorled, 

 entire; flowers solitary-axillary, peduncled; corolla rotate, with a 

 very short tube, the lobes broad; stamens 5; filaments bearded; 

 capsule circumscissile, many-seeded. 



Anagallis arvensis L. Annual, glabrous; stems decumbent or ascending, 

 10-20 cm. high; leaves ovate, sessile; peduncles exceeding the leaves; flowers 

 orange-scarlet, sometimes white; petals obovate, minutely glandular-ciliate. 



Introduced from Europe in fields and waste places. 



