436 PRIMULACE^E trientalis 



STEIRONEMA 



§ § ' Leaf y- stemmed. Leaves entire. Corolla rotate or somewhat 

 so; the divisions convolute or sometimes involute in the bud, wanting 

 in Glaux. 



* Capsule mostly globose, dehiscent longitudi uilly by valves or 

 irregularly. 



5 TRIENTALIS L. Gen. n. 461 



Low and glabrous perennial herbs with a simple stem, simple 

 leaves mostly clustered at the summit and white or pink flowers 

 on hliform pedicels. Flowers 5-7-merous, usually 6-merous. 

 Corolla completely rotate, without a tube, deeply parted, the divi- 

 sions convolute in the bud. Filaments long and slender, united 

 at base into a short ring: anthers linear, recurving when old. 

 Style filiform. Capsule about 5-valvecl. Seeds few, rather large, 

 covered with a white cellular-reticulated pellicle, remaining for 

 some time fast on the placenta in a globular mass. 



T. latifolia Hook. Fl. ii, 121. Stem slender, 2-6 inches high .from 

 a small subterranean tuber : bracts subulate to lanceolate : leaves from 

 lanceolate to ovate, usually abruptly acuminate, 1-3 inches long, narrowed 

 below to a short petiole: pedicels filiform shorter than the leaves: calyx- 

 lobes linear-lanceolate, acute or acuminate : corolla-lobes lanceolate, acu- 

 minate one third longer than the calyx. Common in forests, California to 

 Vancouver Island. 



T. arctica Fischer in Hook. 1. c. T. Europxa var. arctica Ledeb. 

 Stem very slender, 1-4 inches high, with small scattered obovate leaves 

 below; upper leaves obovate-lanceolate to lanceolate, 1-12 lines long: ped- 

 icels filiform, longer than the leaves : lobes of the calyx linear, very acute, 

 2-3 lines long : lobes of the corolla lanceolate, acuminate and tipped with 

 a slender bristle, nearly twice as long as the calyx. In high mountain 

 marshes and along tne coast, Oregon to Alaska and Behring Straits. 



6 STEIRONEMA Raf. Ann. Gen. Phys. vii, 192. 



Leafy-stemmed perennial herbs with opposite or verticillate 

 simple leaves and axillary yellow flowers nodding on slender 

 pedicles. Flowers 5-merous. Corolla rotate Avith no proper tube, 

 deeply 5-parted, the einuses rounded ; the divisions ovate, cuspi- 

 date-pointed, each separately involute or convolute around its 

 stamen. Stamens 5, alternating with 5 slerile filaments; distinct 

 or nearly so, inserted on a ring at the base of the corolla. Capsule 

 10-20-seeded. 



S. ciliatnm Raf. 1. c. Glabrous throughout except the petioles: stems 

 erect, 2-4 feet high, mostly simple : leaves ovate-lanceolate to oblong- ovate, 

 gradually acuminate, 2-5 inches long, mostly with rounded or subcordate 

 base, minutely ciliate, membranaceous, pinriately veined; their long peti- 

 oles hirsutely ciliate : calyx-lobes linear-lanceolate, acuminate : lobes of the 

 corolla obovate, obtuse, nearly twice as long as the calyx, erose-denticulate, 

 4-6 lines long: capsule longer than the calyx. Low grounds, Oregon to 

 Brit. Columbia and across the Continent. 



S. lu'vig-atiim. Stems slender, 1-3 feet high, ^hite and smooth, pan- 

 iculately branched above: leaves lanceolate to linear-lanceolate, all petio 



