erect or ascending, mostly less than 25 mm. long, stellate-pubescent; calyx tube 

 pale, campanulate, the bright-green pubescent lobes linear-elliptic to narrowly 

 triangular-lanceolate. 



Dry soils in open country or in open rocky woods, sometimes in muddy soils 

 along streams and on edge of water bodies, in cen. and w. Tex., Okla. (Waterfall), 

 N.M. (Rio Arriba and Socorro cos.) and Ariz, (widespread); Feb.-Apr.; from 

 Ont. to B.C., s. to Tex., N.M. and Ariz. 



A plant in southern Arizona, designated as var. arizonica (Gray) St. John, has 

 larger, green and foliaceous calyx lobes that are more spreading-recurved than in 

 var. occidentalis, with which it intergrades. 



2. Androsace septentrionalis L. Fig. 611. 



Plant to 3 dm. tall, glabrous to more or less puberulent with reddish glandular 

 or non-glandular hairs; rosette leaves linear-spatulate to oblanceolate, to about 

 35 mm. long and 6 mm. wide above middle, often with stellate pubescence, entire 

 or jagged-toothed; scapes usually several, erect, only the central one well-developed 

 with the others much shorter or wanting; umbels compact; involucral bracts mostly 

 linear-subulate, to 3 mm. long; pedicels strictly ascending or erect, to at least 55 

 mm. long, soon glabrate; calyx turbinate-campanulate, stramineous to green, with 

 short acerose to narrowly triangular or deltoid lobes. A. glandulosa Woot. & Standi. 

 A. pinetorum Greene. 



In open rocky areas on mt. summits, in mud at edge of lakes and ponds, springy 

 places, on gravel bars and in seepage, in the Tex. Trans-Pecos, N.M. (Rio Arriba. 

 Bernalillo, Lincoln, Sandoval, Sante Fe, Socorro and Taos cos.) and Ariz. (Apache 

 and Coconino, s. to Cochise and Pima cos.), Apr .-Sept.; in high mts. of s.w. U.S. 



This species is represented in our region by several named varieties; namely, var. 

 glandulosa (Woot. & Standi.) St. John, the herbage puberulent with numerous 

 reddish glandular hairs; var. suhulifera Gray (A. diffusa Small), with glabrous 

 herbage and calyx lobes slender-subulate to acerose; var. puberulenta (Rydb.) 

 Knuth, with puberulent herbage and calyx lobes narrowly triangular. 



5. Primula L. Primrose 



Plants scapose usually herbaceous perennials, often tufted; flowers showy, in 

 involucrate umbels, 5-merous; calyx persistent, the tube elongated, angled; corolla 

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

 pink or reddish-purple, the open throat greenish or yellowish, fornices absent or 

 inconspicuous; stamens attached in the upper third of the corolla tube, included, 

 the filaments very short; ovary superior; style usually included; capsule opening 

 apically by valves or teeth. 



Probably 200 species mainly in boreal or alpine regions in the North Temperate 

 Zone, especially abundant in south-central Asia. 



1. Scapes with 1 or occasionally 2 flowers; plants 7 cm. tall or less 



1. P. angustifolia. 



1 . Scapes with 3 or more flowers; plants 10 cm. tall or more (2) 



2(1). Plants 25-40 cm. tall, stout; leaves 3-5 cm. wide, usually entire 



2. P. Parry i. 



2. Plants less than 25 cm. tall, slender; leaves less than 2 cm. wide, noticeably 



denticulate (3) 



3(2). Scapes about equaling the leaves; calyx 7 mm. high 3. P. Ellisiae. 



3. Scapes twice as long as the leaves; calyx 4-5 mm. high 4. P. Rusbyi. 



1. Primula angustifolia Torr. 



Plants to about 7 cm. tall; leaves lanceolate-spatulate to linear-lanceolate, 1.5-5 

 cm. long, 2-7 mm. wide, obtuse, entire, not farinose but slightly short glandular- 



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