HYPERICACEAE 



211 



I/Caves not stipulate ; blades punctate : stamens several or many in groups. 



Fam. I. Hypericaceab. 

 Leaves stipulate : blades not punctate : stamens as many as the petals or 

 twice as many, not in groups. Fam. 2. Elatinaceae. 



b. Seeds with copious endosperm. 



Flowers regular, except for the 2 small outer sepals : androecium of many 



stamens, orthotropous. Fam. 3. Cistaceae. 



Flowers irregular : androecium of 5 stamens : ovules anatropous. 



Fam. 4. ViOLACEAE. 

 B. Calyx of partially united sepals. Fam. 5. Passifloraceae. 



Family i. HYPERICACEAE Lindl. St. John's-wort Family. 



Sepals 4, the pairs unequal : petals 4. i. Ascyrum. 

 Sepals 5 : petals 5. 

 Corolla yellow. 



Leaves with flat more or less spreading blades. 2. Hypericum. 



Leaves represented by small erect or appressed scales. 3. Sarothra. 



Corolla pink or greenish purple. 4. Triadenum. 



1. ASCYRUM L. 



Styles 3 or 4 : inner sepals slightly smaller than the outer : leaf-blades clasping. 



1. A. stans. 

 Styles 2 : inner sepals much smaller than the outer : leaf-blades sessile. 



2. A. hypericoides. 



1. Ascyrum stans Michx. ST. PETER'S WoRT. (Man. p. 625 ; I. F. 

 f. 24^2.) In dry sandj' soil, L. I. to eastern Pa., Fla., Tenu. and Tex. — 

 Pennsylvania : Bucks ; Bristol. 



2. Ascyrum hypericoides L. St. Andrew's Cross. (Man. p. 625 ; 

 I. F. /. 2J4J.) In dry sandy soil, Mass. to Fla., 111., Kans. and Tex. — 

 Pennsylvania : Bucks, Penn Valley ; Delaware ; Chester ; Lancas- 

 ter. 



2. HYPERICUM L. 



Styles 5 : capsules 5-celled. 

 Capsules 20-25 mm. long. 1. H. Ascyron. 



Capsules 6-12 mm. long. 2. H. Kalmiamim. 



Styles 3 or rarel5' 4. 

 Shrubs. 3. H. prolijicum. 



Herbs. 



Stamens numerous, 15-40. 



Capsules i-celled or incompletely 3-4-celled. 



Capsules incompletely 3-4-celled by the projecting placentae. 



4. H. adpressiim. 

 Capsules i-celled, with parietal placentae. 



Styles united into a beak, distinct above : inflorescence leafy-bracted. 



5. H. ellipticiim. 

 Styles distinct : inflorescence nearl}' naked. 6. H. z'irga/iim. 



Capsules completely 3-celled. 

 Corolla over 15 mm. broad. 7. //. perforatum. 



Corolla less than 15 mm. broad. 8. H. viaculalum. 



Stamens few, 5-12. 

 a. Inflorescence leafy-bracted. 9. H. boreale. 



