PRIMULACEAE (PRIMROSE FAMILY) 177 



ANDROSACE 



Flowers white or pink. Calyx persistent, s-lobed or -parted. Stamens 

 included. — (Gk. andros = a man, sakos = a buckler or shield ; probably- 

 referring to the form of the leaves.) 



A. Leaves lanceolate or oblong-lanceolate, often toothed, 12-25 mm, long; calyx tube 

 white to reddish; calyx segments subulate; capsule shorter than the calyx. E. 



A. septentrionalis 



AA. Leaves ovate, entire, 3-5 mm. long; calyx tube green; calyx segments triangular; 

 capsule much longer than the calyx. W. E. A. fillformis 



STEIRONEMA 



Perennial; stems leafy. Flowers axillary. CoroUa rotate, deeply 

 S-parted ; sinuses roimded ; segments ovate, cuspidate-pointed, each rolled 

 about its stamen. Stamens alternating with s sterile filaments. Capsule 

 io-20-seeded. — (Gk. steiros = ste.TW.e, nema = a, thread; referring to 

 abortive stamens.) 



A. Leaves ovate-lanceolate to oblong-ovate, minutely ciliate; corolla lobes nearly 

 twice as long as the calyx. C. E. S. cillatum 



AA. Leaves lanceolate to linear-lanceolate, not ciliate; corolla lobes but little longer 

 than the calyx. U. S. laevigatum 



TRIENTALIS (Star Flower) 



Perennial, glabrous ; stem 2.5-15 cm. high, from a tuber. Leaves simple, 

 alternate but mostly clustered at the top. Flowers white or pink ; pedicels 

 filiform. Corolla completely rotate; segments 5-7, almost separate. — 

 (L. trientalis = pertaining to a third; because they are about \ foot high.) 



A. Leaves crowded near the stem tip; woods plant; pedicels shorter than the leaves. 



W. C. E. T. latifolia 



AA. Leaves scattered along the stem; bog plant; pedicels longer than the leaves. 



W. C. E. T. arctica 



DODECATHEON (Shooting Star) 



Perennial, low. Leaves entire to dentate. Flowers in an umbel on a 

 naked scape. Calyic deeply 4-5-lobed; lobes reflexed in flower, erect in 

 Jruit. Corolla segments long, narrow, reflexed. Seeds many. — (Gk. 

 dodeka =12, theos = god; the name of the Primrose, which the 12 superior 

 gods were thought to protect.) 



A. Flower parts normally in 4's. C. E. D. tetrandrum 



AA, Flower parts normally in 5's. 

 B, Herbage glabrous. 

 C, Leaves entire, 

 D. Filaments free or anthers sessile, 



E, Leaves broadly elliptic to obovate, W, D, latifollum (mosquito-buls) 



EE. Leaves narrower, 

 F. Leaves 2-5 cm, long; scape 0,7-1,5 dm, long, E. D. campestre 



r. &R. EL. TL, — 12 



