132 ALSINACEAE. 



Leaves linear-lanceolate, 3-nerved, acutish, flat, less than i cm. long. 



4. A. qnadrivah'is. 

 Sepals obtuse. 5. A. obtusiloba. 



1. Alsinopsis macrantha Rydb. In sandy soil in the mountains of Colo. 

 Little Kate Basin, La Plata Mountains. 



2. Alsinopsis propinqua (Richards.) Rydb. (Arcnaria propinqua Richard- 

 son; A. verna hirta Am. auth. ; A verna acquicaulis A. Nels.) In sandy soil 

 from Hudson Bay and Mackenzie River, to B. C., Colo, to Utah. Alt. Sooo- 

 13,000 ft. Pike's Peak ; Silverton ; Saddle Cliffs ; Georgetown ; Little Kate 

 Basin, La Plata Mountains ; near Pagosa Peak ; South Park ; Boreas ; Beaver 

 Creek; Chambers' Lake; Eldora to Baltimore. 



3. Alsinopsis Rossii (Richards.) Rydb. (Arenaria Rossii Richards.) In 

 arctic-alpine regions from the arctic coast to Colo, and Wash. Alt. 11,000- 

 13,500 ft. Sierra Blanca; Bald Mountain. 



4. Alsinopsis quadrivalvis (R. Br.) Rydb. (Arenaria quadrivalvis R. Br.) 

 In alpine-arctic situations, along the arctic coast of North America and on 

 alpine peaks in Colo. " Colorado." 



5. Alsinopsis obtusiloba Rydb. (Arenaria obtusa Torr. ; not All. ; A. biflora 

 S. Wats., in part; A. Sajanensis Robinson; scarcely Willd.) On exposed 

 mountain tops from Alb. to B. C., N. M. and Utah. Alt. 10,000-13,500 

 ft Mt. Garfield; Pike's Peak; Beaver Creek; Ward, Boulder Co.; Mount 

 Ouray; Alpine Tunnel; Mt. Harvard; Cameron Pass; Iron Mountain; West 

 Spanish Peak ; near Pagosa Peak ; Gray's Peak ; Mt. Princeton ; Seven 

 Lakes; Caribou; Empire; headwaters of Clear Creek; Massif de 1'Arapahoe ; 

 mountains near Como ; Cameron Pass ; Graymont ; Beaver Creek ; Berthoud 

 Pass ; northwest of Como ; Gray's Peak ; Cameron Pass ; Graymont ; Ethel 

 Peak. 



7. TISSA Adans. SAND SPURRY. 



i. Tissa sparsiflora Greene. Sandy and alkaline soil from Wyo. to B. C., 

 Colo, and Ore. New Windsor. 



Family 52. CARYOPHYLLACEAE Reichenb. PINK FAMILY. 



Calyx-ribs, usually 10, at least twice as many as the teeth, running both into the 

 teeth and the sinuses. 



Styles mostly 3 ; capsule usually septate at the base. i. SILENE. 



Styles 5 ; capsule i-celled to the base. 2. LYCHNIS. 



Calyx strongly 5-angled and 5-ribbed. 3. VACCARIA. 



i. SILENE L. CATCHFLY, CAMPION. 



Annuals. 



Glabrous or nearly so or the upper nodes glutinous. 



Stem-leaves linear or linear-lanceolate ; bracts narrowly linear-lanceolate. 

 Petals exceeding the sepals by 2-5 mm. ; blade obovate-cuneate, 2-cleft. 



i. S. antirrhina. 



Petals none or small, not exceeding the sepals ; blade cuneate, truncate or 



emarginate at the apex. 2. S. antirrhina depauperata. 



Stem-leaves oblanceolate or lanceolate ; bracts lanceolate, more or less scarious- 



margined below. 3. S. antirrhina vaccariifolia. 



Viscid-pubescent or hirsute throughout. 4. S. noctiflora. 



