FLOWERING PLANTS AND FERNS OF ARIZONA 305 



4. Stellaria umbellata Turcz., Soc. Imp. Nat. Moscou Bui. 15: 173. 



1842. 



Alsine baicaknsis Coville, Contrib. U. S. Natl. Herbarium 4: 

 70. 1893. 



San Francisco Peaks (Coconino County), 11,000 to 12,000 feet, 

 July and August. Montana to Oregon, south to New Mexico, 

 northern Arizona, and California; Siberia. 



5. Stellaria longipes Goldie, Edinb. Phil. Jour. 6: 327. 1822. 



Alsine longipes Coville, Contrib. U. S. Natl. Herbarium 4: 

 70. 1893. 



White Mountains, Apache County {Zuck in 1897), Chiricah.ua 



Mountains, Cochise Count}', 9,200 feet (Blvmer 1602), June and July. 

 Greenland to Alaska, south to New Mexico, Arizona, and California; 

 northern Asia. 



6. Stellaria longifolia Muhl. ex Wffld., Enum. PI. 479. 1809. 



Alsine longifolia Britton, Torrev Bot. Club Mem. 5: 150. 

 1894. 



Buck Springs Ranger Station, Coconino County, 7,500 feet (Col- 

 lom 783), July. Canada to Maryland and Arizona. 



2. CERASTIUM 



Plants herbaceous, annual or perennial, mostly pubescent; flowers 

 in terminal cymes; sepals and petals commonly 5, the petals 2-lobed 

 or 2-cleft, rarely wanting; capsules dehiscent only near the apex. 



The name powderhorn, suggested by the shape of the capsule, is 

 sometimes given these plants. They are also known as mouse-ear 

 chickweed. 



Key to the species 



1. Plants perennial, commonly loosely cespitose; capsules not or but slightly 

 more than twice as long as the calyx (2). 

 2. Petals not surpassing and often shorter than the sepals; leaf blades oblong- 

 ovate to oblong-lanceolate, obtuse 1. C. VULGATUM. 



2. Petals surpassing the sepals (3). 



3. Stems decumbent or prostrate; lower leaves with oblong or oblanceolate. 

 obtuse or acutish blades; petals commonly less than twice as long as 



the sepals 2. C. beerixgiaxim. 



3. Stems erect, or ascending; lower leaves commonly with linear or linear- 

 lanceolate, acute blades; petals fully twice as long as the sepals. 



3. C. ARVEXSE. 

 1. Plants mostly annual; petals less than twice as long as the sepals (4). 



4. Leaf blades oblanceolate or obovate; capsules straight, less than twice as 

 long as the calyx, their teeth at maturity strongly revolute from the tip. 



4. C. TEXAXUM. 



4. Leaf blades mostly lanceolate to ovate-oblong, the lowest ones sometimes 



oblanceolate; capsules usually curved. 2 to 3 times as long as the calyx, 



their teeth at maturity not revolute from the tip, but often with revolute 



margins (5). 



5. Pedicels in fruit seldom more than twice as long as the calyx, straight, or 



slightly and gradually curved; leaf blades oblong or oblong-ovate. 



5. C. BRACHYPODUM. 



5. Pedicels in fruit mostly 3 or more times as long as the calyx, usually 

 strongly curved or hooked near the apex; leaf blades linear-lanceolate 

 or oblong-lanceolate 6. C. nutans. 



