76 PRIMULACE^:. 



PRIMULACEJS. 



Leaves all radical: nodding flowers on a naked scape in a bracteate umbel 1 



Leaves radical or crowded on tufted stems, cuneate-spatulate, 5-7-toothed at apex. ... 3 



Leaves in a whorl at top of stem, bracts below: corolla rotate, rose to white 3 



Leaves all or mostly opposite: flowers axillary. 



Flowers small, yellowish, in close clusters; corolla rotate 4 



apetalous, solitary, purplish or white 5 



solitary: corolla rotate on slender pedicel 6 



Leaves all or mostly alternate: flowers solitary, minute 7 



flowers in paniculate racemes, very small 8 



1. DODECATHEON, Linnaeus. 



• Short filaments united to form with the closely connivent anthers a darlc colored beak aur- 



mounting the short corolla tube. 



Capsule obtuse, spitting at or from the apex into valves. 



Leaves from narrowly to broadly spatulate: capsule oblong or longer 1 



Leaves obovate or oval, short, base fcuneate: capsule globular 2 



Capsule cylindraceous; apex not splitting, but coming off as a lid 3 



• * Short distinct filaments included in the corolla throat, only the anthers exserted: leaves 



oval or ovate to oblong, not tapering at base 4 



1. D. Jeflfreyi, Moore. Often very large: capsule exceeding calyx. 



2. D. ellipticum, Nutt. Leaves ^ to 2 inches long: calyx minutely glandular. 



3. D. Henderson!, Gr. Like the last except the thin-walled exserted capsule. 



4. D. frigidum, C. & S. var. dentatum. Leaves commonly repand or dentate. 



2. TBJMJTLA, Linnseus. 



1. P. suffrutescens, Gr. Scape 2 to 4 inches long: umbel of several red-purpla 

 flowers. 



3. TRIENTALIS, Linnaeus. 

 1. T. E\irop8Ba, L. Flowers on slender pedicels among the leaves. Our plants are: 

 Var. latifolia, Torr., with leaves mostly acute, J to 4 inches long, and 

 Var. arctica, Ledeb., with obtuse or retuse leaves an inch long or less. 



4. LTSIMACHLA, Tournefort. 

 1. Ii. thyrsiflora, L. Leaves lanceolate: small teeth between corolla lobes. 



5. GLAUX, Tournefort. 

 1. Q. zciaritima, L. Succulent, pale green, 3 or 4 inches high, leafy. 



