302 P rimulaceae 
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 L. 
AA. Leaves ovate, entire, 35 mm. long; calyx-tube green; calyx-segments triangular; 
capsule much longer than the calyx. W. E. 
A. filiformis Retz. 
SAMOLUS BROOK-WEED 
Glabrous; stems leafy, 15—-45 cm. high (ours). Leaves alternate, entire; in ours 
ovate to spatulate, 2.5—-7.5 cm. long. Flowers small, white, in simple or panicled (ours) 
racemes. Calyx persistent, 5-lobed; tube adherent to ovary below. Corolla epigynous, 
nearly campanulate; segments rounded. Staminodia 5 or none, in the sinuses of the 
corolla. Capsule ovate or spherical, 5-valved at top. Seeds many, minute. (Said to 
be from Celtic sana greeting, mos—a pig; it was thought a cure for diseases of pigs.) E. 
S. floribundus HBK. 
STEIRONEMA 
Perennial; stems leafy. Leaves opposite or whorled, simple. Flowers axillary, 
yellow, nodding; pedicels slender. Corolla rotate, without proper tube, deeply 5-parted; 
sinuses rounded; segments ovate, cuspidate-pointed, each involute or rolled about its sta- 
men. Stamens alternating with 5 sterile filaments, distinct or nearly so. Capsule 10—20- 
seeded. (Gk. steiros—sterile, nema—a thread; referring to abortive stamens. ) 
A. Stems mostly simple; leaves ovate-lanceolate to oblong-ovate, minutely ciliate; co- 
rolla-lobes nearly twice as long as the calyx. C. E. 
S. ciliatum Raf. 
AA. Stems paniculately branched above; leaves lanceolate to linear-lanceolate, not 
ciliate; corolla-lobes but little longer than the calyx. U. 
S. laevigatum How. 
NAUMBURGIA 
Perennial, erect, 3—6 dm. high (ours). Leaves opposite, entire, the lower ones 
mere scales; in ours sessile, 2.5-5 cm. long, lanceolate, punctate. Flowers small, yel- 
low, in axillary spikes or heads. Calyx 5—7-divided; segments linear. Corolla-segments 
narrow, almost distinct. Stamens exserted; staminodia tooth-like, | at each sinus of the 
corolla. Capsule 5—-7-valved. Seeds few. (Probably in honor of a Mr. Naumberg. ) 
GRES N. thyrsiflora Duby (Tufted Money-wort) 
TRIENTALIS STAR-FLOWER 
Perennial, glabrous; stem simple, 2.5—15 cm. high (ours), from a subterranean 
tuber (ours). Leaves simple, alternate but mostly clustered at the top. Flowers white 
or pink; pedicels filiform. Corolla completely rotate, without a tube, deeply parted; 
segments 5—-7. Capsule about 5-valved, seeds few, rather large, white. (L. trienta- 
lis—pertaining to 1/3; because they are about | /3 foot high.) 
A. Leaves crowded near the stem-tip; woods plant; pedicels shorter than the leaves. W. 
CHES T. latifolia Hook. 
AA. Leaves scattered along the stem; bog plant; pedicels longer than the leaves. W. 
CSE: T. arctica Fisch. 
