PRIMULACEAE 431 



A. vulgaris Willd. 1. c. Scapes 8-12 inches high: leaves narrowly li- 

 near, flat or flattish, 1-3 inches long : bracts very obtuse : calyx at base sim- 

 ply decurrent on the pedicel; the tube 10-nerved, hairy at least on the 

 stronger nerves or angles; the lobes blunt or cuspidate. Along the coast, 

 California to the Arctic regions and the Atlantic coast. Europe and Asia. 



Order LVIII PRIMULACEAE Vent. Tabl. ii, 385. 



Herbs with simple leaves and symmetrical flowers. Calyx 4- 

 8-lobed or 4-8-parted, free, or rarely adnate to the base of the 

 ovary, imbricated in the bud, usually persistent. Corolla hypo- 

 gynous, except in Samolus in which it coheres below with the 

 base of the ovary, 4-8-lobed or 4-8-parted, rarely none. Stamens 

 as many as the lobes of the corolla and opposite to them, inserted 

 on the tube or base of the corolla, rarely perigynous : anthers in- 

 trorse. Ovary one-celled, with a free central placenta. Fruit 

 capsular. Seeds with small straight embryo and copious albumen. 



Tribe i. Ovary wholly free: ovules amphitropous . or half- 

 anatropous. 



* Scapose or tufted : flowers chiefly 5-merous, umbellate or solitary : 

 capsule dehiscent by valves, at least at the apex. 



"*" Stamens connivent in a cone around the pistil, monadelphous. 



1 Dodecatheon Corolla 5-parted, its division reflexed : filaments shorter 

 than the anthers. 



■•" ■*" Corolla salverform or funnelform : stamens distinct, included, 

 with short filaments and short and blunt anthers. 



'I Primula Corolla with tube surpassing or at least equalling the calyx, 

 and spreading, mostly obcordate or emarginate lobes : capsule many- 

 seeded. 



3 Douglasia Corolla with tube equalling or surpassing the calyx, and 

 entire lobes : ovary 5-ovuIed : capsule 1-3-seeded. 



4 Androsace Corolla short, its tube shorter than the calyx : ovules and 

 seeds numerous or few. 



* * Leafy stemmed : corolla rotate or somewhat so and the divisions 

 convolute or sometimes involute in the bud, wanting in Glaux. 



■*" Capsules mostly globose, dehiscent vertically by valves, or 

 irregularly. 



5 Trientalis Leaves clustered at the summit of a simple stem : flowers 

 mostly 7-merous : corolla completely rotate, without a tube, deeply 

 parted : filaments long and filiform, united at base into a ring. 



6 Steironema Leaves opposite, without dots : flowers 5-merous on slen- 

 der drooping peduncles : corolla rotate, with no proper tube, deeply 

 parted ; the divisions each wrapped around a stamen. 



7 Naumburgia Stems leafy throughout, the herbage glandular-dotted : 

 flowers 5-7-merous, on stout axillary peduncles : corolla, without proper 

 tube, the lobes not wrapped around the stamens. 



8 Glaux Stems leafy throughout : flowers solitary in the axils of the 

 opposite leaves, 5-merous ; corolla none : stamens inserted on the base 

 of the calyx. 



"*" '^ Capsule" globose, the top falling off as a lid: seeds numerous. 



