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



SPHAERALCEA (GLOBE MALLOW) 



Perennial. 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-lobed,or not lobed; flowers usually scarlet; 

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



A A. Leaves not canescent, 5-15 cm. long, 3-y-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 palmately veined. Stamen 

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

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



A. Plant scurf y-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 5-10; capsule i-celled. W. H. majus 



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

 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. formosum 



ELATINACEAE (WATERWORT FAMILY) 



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

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



