PRIMULACEAE. 261 



Order 40. PRIMULALES. 

 Family 105. PRIMULACEAE Vent. Primrose Family 



Corolla present. 



Corolla-lobes erect or spreading ; stamens distinct. 



Corolla salverform or funnelf orm, its lobes imbricated ; stamens included ; 

 plants scapiferous ; leaves basal. 

 Corolla-tube equalling or exceeding the calyx ; style filiform ; flowers 



conspicuous. i. Primula. 



Corolla-tube shorter than the calyx ; throat constricted ; style very short ; 

 flowers minute. 2. Androsace. 



Corolla rotate, its lobes convolute or involute in the bud ; stamens exserted ; 

 plants leafy-stemmed. 

 Flowers axillary, solitary ; corolla-lobes broad, curved around the stamens ; 



staminodia conspicuous. 3. Steironema. 



Flowers in axillary short spikes ; corolla-lobes long and linear ; tube very 

 short ; staminodia tooth-like. ' 4. Naumburgia. 



Corolla-lobes reflexed ; stamens more or less raonadelphous ; plants scapiferous. 



5. DODECATHEON. 



Corolla wanting ; calyx with 5 petaloid lobes ; flowers solitary, sessile in the axils 

 of the opposite stem-leaves. 6. Glaux. 



1. PRIMULA L. Primrose. 



Bracts of the involucre more or less gibbous at the base ; lobes of the corolla 

 deeply 2-cleft, i. e., at least one-fourth their length ; leaves densely mealy 

 beneath. 1. P. am'ericana. 



Bracts of the involucre not gibbous below ; lobes of the corolla merely emarginate 

 or notched, rarely entire ; leaves not mealy. 

 Plant less than i dm. high, i-few-flowered ; flowers less than 2 cm. long. 



■^. P. angustifolia. 

 Scape 1.5-5 dm. high, many-flowered; flowers over 2 cm. long. 



3. P. Parryi. 



I. Primula americana Rydb. (P. farinosa Hook.; not L.) In swamps and 

 wet meadows from Ass. and Alb. to Colo. — Alt. about 8000 ft. — Near Lake 

 John, North Park; Gunnison. 



.i. Primula angustifolia Torn On alpine peaks of Colo. — Alt. 9000-14,400 ft. 

 — Saddle, Pike's Peak ; Marshall Pass ; Gray's Peak ; Pike's Peak ; Berthoud 

 Pass near Georgetown; West Spanish Peak; Sierra Blanca; headwaters of 

 Clear Creek. 



3. Primula Parryi A. Gray. Along cool mountain streams from Mont, to 

 Colo, and Ariz. — Alt. 9000-13,000 ft. — Bottomless Pit, Pike's Peak; Berthoud 

 Pass, near Georgetown ; Cameron Pass ; Tennessee Pass, 7 miles west of 

 Leadville; tributaries of South Fork of Cache La Poudre River, Larimer 

 Co.; Elk Mountains; Gray's Peak; Slide Rock Caiion; timber line above 

 Cameron Pass ; mountains south of Ward, Boulder Co. ; Carson ; summit of 

 Mt. Garfield; headwaters of Clear Creek; Lake City; Caribou; Graymont; 

 Beaver Creek; Berthoud Pass. 



2. ANDROSACE L. 



Perennials, cespitose and proliferous ; corolla 5-8 mm. in diameter. 



1. A. carinata. 

 Annuals, not cespitose-proliferous, or the last one may be perennial by rosettes ; 

 corolla 3-4 mm. wide. 



