152 HYPERICACEAE (ST. JOHN'S-WORT FAMILY) 



SPHAERALCEA (Globe Mallow) 



l^erennial. Involucre 2-3-leaved, setaceous, often deciduous. Stamen 

 column simple; filaments distinct above, many. Styles 5 or more. Seed 

 reniform. — (Gk. sphaira — a sphere, alkea = a mallow : referring to the 

 commonly spherical fruit.) 



A. Leaves canescent, 2.5-5 cm. long, 3-5-Iobed,or not lobed; flowers usually scarlet; 

 calyx lobes 4-6 mm. long. E. S. munroana 



AA. Le:ivcs not canescent, 5-15 cm. long, 3-7-lobed or -cleft; flowers usually rose- 

 colored. 

 B. Calyx lobes ovate, 4-6 mm. long; pedicels usually less than 6 mm. long. E. 



S. rivularis 



BB. Calyx lobes caudate-acuminate, 15-25 mm. long; pedicels 10 mm. or more 



long. E. S. longisepala 



SIDA (Oblique Mallow) 



Pubescent or tomentose. Leaves pinnately or pahnately veined. Stamen 

 tube simple. Petals oblique. Styles 5 or more. Carpels 6-10, separating 

 from the axis. — (Greek name of some plant.) 



A. Plant scurfy-canescent, perennial; leaves reniform to ovate-cordate; calyx sub- 

 tended by an involucre of 2-3 bractlets. E. S. hederacea 



AA. Plant glabrous or puberulent, annual; leaves lanceolate to ovate-cordate; calyx 

 not subtended by an involucre. W. S. acuta 



HYPERICACEAE (St. John's-wort Family) 



Herbs. Leaves opposite, entire, pellucid-punctate or black-dotted ; 

 stipules none. Flowers regular, perfect. Sepals 5. Petals 5. 

 Stamens 5 to many. Ovary superior; styles 1-7. Fruit a capsule, 

 septicidal. Seeds many. — Only the following genus. 



HYPERICUM (St. John's-wort) 



Petals yellow. Capsule i-6-celled. — (Said to be from Gk. hyper = 

 under ; + erica = a heather.) 



A. Plants low, often prostrate or ascending, often matted. W. C. E. 



H. anagalloides (creeping st. john's-wort) 

 AA. Plants erect. 

 B. Plant annual; stamens s-io; capsule i-celled. \V. H. majus 



BB. Plant perennial; stamens more than 12; capsule 3-ceIled. 

 C. Sepals lanceolate, acute or acuminate: capsule not lobed. W. 



H. perforatum (common st. john's-wort) 

 CC- Sepals oval or oblong, obtuse; capsule 3-lobed. W. E. H. fonnosum 



ELATINACEAE (Waterwort FAJtiLv) 



Herbs. Leaves opposite, entire or serrate; stipules present. 

 Flowers small, axillary, solitary or fascicled, perfect, regular. 



