PRIMULACEAE (PRIMROSE FAMILY) 377 



nate, often delicately rugulose: capsule cylindric, circumscissile. (D. pulchrum 

 Rydb. 1. c.) Montana and western Wyoming to Oregon and Washington. 



6. STEIRONEMA Raf. FRINGED LOOSESTRIFE 



Leafy-stemmed perennial herbs, with opposite or verticillate simple leaves 

 and axillary yellow flowers nodding on slender pedicels. Flowers 5-merous. 

 Corolla rotate, with no proper tube, deeply 5-parted, the sinuses rounded; the 

 divisions ovate, cuspidate-pointed, each separately involute or convolute 

 around its stamen. Stamens 5, alternating with 5 sterile filaments, distinct 

 or nearly so, inserted on a ring at the base of the corolla. Capsule 10-20- 

 seeded. 



1. Steironema ciliatum (L.) Raf. Ann. Gen. Phys. 7: 192. 1820. Glabrous 

 throughout except the petioles: stems erect, 4-10 dm. high, mostly simple: 

 leaves ovate-lanceolate to oblong-ovate, gradually acuminate, 5-12 cm. long, 

 mostly with rounded or subcordate base, minutely ciliate, membranaceous, 

 pinnately veined; the long petioles hirsutely ciliate: calyx-lobes linear- 

 lanceolate, acuminate: lobes of the corolla obovate, obtuse, nearly twice as 

 long as the calyx, erose-denticulate, 8-12 mm. long: capsule longer than the 

 calyx. Low moist grounds; Colorado and Wyoming and thence across the 

 continent. 



7. NAUMBERGIA Moench. 



Erect perennial herbs, with opposite entire leaves, the lower reduced to 

 scales, and small yellow flowers in short axillary spikes. Calyx 5-7-divided, 

 the sepals linear, slightly imbricated. Corolla deeply 5-7-parted, with very 

 short tube and narrow segments. Stamens 5-7, exserted; filaments slender, 

 glabrous, slightly united at base, alternating with as many small tooth-like 

 staminoclia at each sinus of the corolla. Style slender, equaling the stamens; 

 stigma capitate. Capsule 5-7-valved, few-seeded. 



1. Naumbergia thyrsiflora (L.) Duby, in DC. Prodr. 8: 60. 1844. Glabrous 

 or becoming so: stem 3-6 dm. high, from a slender rootstock: leaves lanceo- 

 late, sessile, 3-6 cm. long, the lower smaller and the lowest reduced to ovate 

 scales : peduncles from only 2 or 3 pairs of leaves near the middle of the stem, 

 axillary, shorter than the "subtending leaf, bearing several or numerous small 

 flowers in a dense head or oblong spike: lobes of the calyx linear-lanceolate, 

 acute, half as long as the narrow purple-dotted lobes of the corolla: capsule 

 globose, glandular-dotted, few-seeded. In boggy ground; across the con- 

 tinent; also in Europe and Asia. 



8. GLAUX L. 



Small leafy-stemmed herbs, with opposite entire leaves and small, axillary, 

 white or pink apetalous flowers. Calyx 5-parted, the lobes petaloid, about as 

 long as the campanulate tube. Stamens 5, inserted at the base of the calyx 

 and alternate with its lobes ; filaments subulate-filiform ; anthers cordate. Cap- 

 sule 5-valved at the top, few-seeded. 



1. Glaux maritima L. Sp. PI. 237. 1753. Glabrous and glaucous or pale 

 perennial by slender running rootstocks: stems 5-10 cm. high, erect or 

 spreading: leaves oval to oblong-linear, 6-12 mm. long, entire, sessile: calyx- 

 lobes oval, purplish or white. Salt marshes along both seacoasts; also in sub- 

 saline soil in the interior west of the Mississippi. 



9. SAMOLUS L. BROOKWEED 



Low glabrous annuals, with alternate entire leaves and small white flowers 

 in simple or panicled racemes. Calyx persistent, its tube adnate to the ovary 

 below. Corolla perigynous, nearly campanulate; the rounded lobes imbri- 



