MALVACEAE. 231 



3. Sphaeialcea Ciandallii Rydb. Mountains of Colo. — Alt. about 7000 ft.^ 

 Steamboat Springs. 



4. Sphaeialcea rivularis (Hook.) Torr. {Malva rivularis Hook.; Sphaeral- 

 cea acerifolia Nutt.) Along streams from Alb. and B. C. to S. D., Colo, and 

 Nev. — Four-Mile Hill, Routt Co. ; Ragged Mountain, Gunnison Co. ; Buffalo 

 Pass ; Park Range ; Fish Creek Falls. 



5. Sphaeialcea giandifloia Rydb. Mountains of Colo. — Alt. 7000-9000 ft. — 

 Mesa Verde; west of Ouray. 



6. SIDA L. 



I. Sida sagittaefolia (A. Gray) Rydb. (^Sida lepidota sagittaefolia A. 

 Gray) Plains from Colo, to Tex. and Ariz. ; also in Hex. — " Southern 

 ■ Colorado." 



7. ABUTILON Gaertn. Velvet-leaf, Indian Mallow. 



1. Abutilon paivulum A. Gray. In dry soil from Colo, to Tex. and Ariz. 

 — Canon City. 



Order 34. HYPERICALES. 



Styles wanting ; stigma introrse ; ours small water-plants. 87. Elatinaceae. 

 Styles present ; stigmas capitate or nearly so. 

 Styles in ours distinct. 



Sepals persistent, united into a tube; leaves not pellucid-dotted. 



88. Feankeniaceae. 



Sepals distinct ; leaves pellucid-dotted. 89. Hypericaceae. 



Styles wholly united. 



Corolla regular or nearly so ; stamens 8. 90. Cistaceae. 



Corolla irregular; one petal spurred; stamens 5. 91. Violaceae. 



Family 87. ELATINACEAE Lindl. Water-wort Family. 



I. ELATINE L. Water-wort, Mud Purslane. 

 Leaves oblanceolate ; flowers usually 3-merous. 1. E. triandra. 



Leaves obovate ; flowers 2-merous. 2. E. americana. 



1. Elatine triandia Schkur. In shallow water from Ills, and Wyo. to Colo. 

 —Platte River. 



2. Elatine americana Arn. In mud and shallow water from Que. and B. C. 

 to Va., Colo, and Calif. — Platte River. 



Family 88. FRANKENIACEAE. 

 I. FEANKENIA L. 



I. Frankenia Jamesii Torr. On saline plains from Colo, to Tex. and Son- 

 ora.^Bluffs about Pueblo ; Rocky Ford, Otero Co. ; Cafion City. 



Family 89. HYPERICACEAE Lindl. St. John's Wort Family. 



I. HYPERICUM L. St. John's Wort. 



Petals more than twice as long as the sepals ; both usually margined with black 

 glands. I. H. formosum. 



Petals slightly exceeding the sepals ; black glands none. 2. H. majus. 



