FLOWERING PLANTS AND FERNS OF ARIZONA 665 



flowers perfect, regular; corolla gamopetalous but sometimes cleft 

 nearly to the base; stamens inserted separately on the corolla; style 

 and stigma 1 ; ovary superior or partly inferior, 1 -celled. 



The family includes some highly ornamental plants, notably several 

 species of Primula that are much cultivated under the names prim- 

 rose and cowslip, and the well known cyclamen. 



Key to the genera 



1. Ovary partly inferior, its base enveloped by and adnate to the base of the calyx 



tube . 3. Sa.molus. 



1. Ovary superior, not adnate to the calyx tube (2). 



2. Plants caulescent, the sterns leafy; corolla rotate (3). 



3. Flowers numerous, in leafy panicles; corolla yellow: capsule dehiscent 



longitudinally 4. Lysimachia. 



3. Flowers few, solitary, axillary; capsule circumscissile, globose; plants 

 small, annual (4). 

 4. Corolla norrnalPy red, longer than the calyx: leaves opposite: filaments 



bearded 5. Axagallis. 



4. Corolla whitish, shorter than the calyx; leaves alternate; filaments not 



bearded 6. Cextuxculus. 



2. Plants acaulescent or nearly so: flowers in umbels or solitary at the apex of 



the scape; corolla white or purplish pink, often with a differently colored 



eye (5). 



5. Corolla with entire reflexed lobes and a dark eye, showy; stamens inserted 



in the throat of the corolla, exserted, the filaments united at lea>t at 



base, the anthers connivent around the pistil 7. Dodecatheox. 



5. Corolla with erect or spreading lobes: stamens inserted in the tube of the 

 corolla, included, the filaments separate, the anthers not con- 

 nivent (6).. 



6. Plants perennial: flowers relatively large and showy 1. Primula. 



6. Plants annual; flowers small and inconspicuous 2. Axdro.^ace 



1. PRIMULA. 5 Primrose 



Plants scapose, often tufted; calyx tube elongate, angled; corolla 

 surpassing the calyx at anthesis, often with obcordate lobes, the 

 limb pink or reddish purple, the throat open, greenish or yellowish; 

 capsule opening apieally by valves or teeth. 



Key to the species 



1. Scapes stout, up to 55 cm. long; leaf blades entire or nearly so; pedicels and 

 calyx copiously to densely glandular-puberulent, not at all mealy: corolla 

 with a limb 2 cm. or more in diameter, the lobes shallowly notched or nearly 



entire, the tube not or but slightly surpassing the calyx 1. P. parryi. 



1. Scapes slender, not more than 25 cm. long: leaf blades denticulate or dentate; 



pedicels and calyx not glandular-puberulent, more or less white-mealy; 



corolla with a limb less than 2 cm. in diameter, the lobes distinctly notched, 



the tube surpassing the calyx (2). 



2. Leaf blades denticulate or dentate, pruinose but not mealy beneath: calyx 



mealy only at base and near the margins of the lobes 2. P. rtjsbyi. 



2. Leaf blades conspicuously and irregularly dentate, more or less white-mealy 

 beneath, at least when young; calyx mealy over most or all of its 

 surface 3. P. specuioola. 



1. Primula parryi A. Gray, Amer. Jour. Sci. ser. 2, 34: 2,57. 1S62. 



San Francisco Peaks (Coconino County), Baldy Peak (Apache 

 County), 10,000 to 12,000 feet, among rocks, often along brooks, 

 June to August. Montana and Idaho to New Mexico and Arizona. 



The plant is showy but rather coarse, and the flowers have an 

 odor of carrion. 



' Reference: Williams, L. O. revision of the western primulas. Amer. Midland Nat. 17: 741-74$. 

 1936. 



