PRIMROSE FAMILY 647 



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Scapose annuals; capsule many-seeded. 4, Androsace. 



Corolla rotate, its lobes coavolute or involute in bud; stamens exserted; plants 



leafy-stemmed. 

 Capsule opening lengthwise; erect plants. 



Flowers mostly 7-merous; corolla white; proper leaves clustered near 



the top of the stem, the lower ones reduced. 6. Tiukataus. 



Flowers mostly 5-merous; leaves scattered on the stem, opposite or 



verticillate. 

 Staminodia w^anting; filaments united at the base; flowers solitary 



or racemose. 6. LVblMACiiiA, 



Staminodia present; filaments distinct. 



Flowers solitary; staminodia conspicuous; corolla-lobes broad. 



7. STEIROXEBktA. 



Flowers in short axillary spikes; staminodia tooth-like; corolla- 

 lobes long and linear. 8. Naumbukgia. 

 Capsule circuniscissile; low dej)ressed herbs. 



Corolla longer than the calyx ; filaments pubescent, adnate to the base 



of the corolla. 9. Anagallis. 



Corolla shorter than the calyx; filaments glabrous, adnate to the corolla- 

 tube. 10. Centunculus. 



Corolla-lobes refiexed; stamens more or less monadelphous; plants scapose. 



12. Dodecatiieon. 



Corolla wanting; calyx with 5 petaloid lobes; flowers solitary, sessile, axillary. 



11. Gl.\ux. 



Ovary partly inferior, the lower portion included in and adnate to the hypanthium; 

 plant leafy-stemmed. 13. S.uioLua. 



1, PRIMULA L. Primrose, Cowslip. 



Perennial scapose herbs. Leaves all in a basal rosette. Flowers in ours 

 umbellate. Calyx tubular, campanulate or funnelform, persistent, usually 

 angled, 5-lobed, the lobes imbricate. Corolla salver-shaped or trumpet-shaped, 

 with a funnelform throat, the tube longer than or equaUing the calyx. Stamens 

 5, distinct, inserted in the tube or the throat of the corolla. Style filiform; 

 stigma capitate. Capsule 1-celled, 5-valved at the apex, manj'-seeded. 



Bracts of the involucres more or less gibbous at the base; lobes of the corolla deeply 2- 



cieft. 

 Plant usuaUy less than 1 dm. high, rarely mealy. 



Calyx about one-half as long as the corolla-tube; lobes oblong, obtuse; leaves thin. 



1. P. mistassimca. 



Calvx at least two-thirds as long as the coroUa-tube; lobes acutish; leaves rather 



thick. 2. P. MacCalliana. 



Plant taUer,'l-4 dm. high, usually more or less mealy; leaves oblong or oblong-spatu- 



Bracts lanceolate, thick, obtusish. ; > 3. P. tncana. 



Bracts Unear-subulate, thin. 4. P. specuicola. 



Bracts of the involucres not gibbous below; lobes of the corolla merely emargmate or 



notched, or entire. , .x. « 



Plant less than 1 dm. high, 1-few-flowered ; flowers less than 2 cm. long. 



Scape usuaUv l-flowered, rarely 2-flowered; bracts subulate, small, less than o mm. 

 \qxis, * 5. P. angustifolia. 



Scapes 2-4-flowered; bracts conspicuous, oblong, more than 5 mm. long. 



^ 6. P. Broadheadae. 



Plant 1 5-5 dm. high, many-flowered; flowers more than 2 cm. long. 



7. P. Parryi, 



1. P. mistassinica Michx. Leaf-blades spatulate or obovate, denticulate 

 or re'pand, 1-3 cm. long, obtuse or rounded at the apex; scape 1-1.5 dm. high, 

 slender; bracts subulate; caly^-lobes nearly as long as the tube; corolla pink or 

 pale purple; lobes of the limb usually 4-5 mm. long, obcordate. Wet banks: 

 Greenl.— Nev.— Minn.— Alta. Boreal My-Jl. 



2. P. MacCalliana Wiegand. Leaf-blades broadly spatulate or obovate- 

 cuneate 'rather thick, 1-2.5 cm. long, obtuse or rounded and crenate at the apex; 

 scape 5-12 cm. high; bracts subulate, 5 mm. long; corolla deep rich blue, with a 

 large orange e^^e; lobes 5-6 mm. long, broadly obcordate. Wet places m the 

 Rockies: Alta.— B.C. Mont. Je. 



3 P. incana M. E. Jones. Leaf-blades oblong or oblong-oblanceolate or 

 spatulate 2-8 cm. long, obtuse at the apex, sinuate-dentate or subentire, more 

 or less mealy beneath; scape 1-3 dm. high; bracts 6^10 mm. long; calyx 6-8 mm. 

 lonff nearly equalling the corolla-tube, more or less mealy; lobes oblong, obtuse 

 or acutish; coroUa lUac, 8-9 mm. long; lobes obcordate, 2-3 mm. long. P. amer- 



