MALLOW FAMILY 563 



or parchment-like, more or less prominently beaked, 2-valved at the apex and 

 on the back, with 1-6 reniform seeds. 



1. A. parvulum A. Gray. Cespitose perennial, with woody base; stems 

 2-4 dm. high, cinereous-stellate, spreading; leaf-blades rounded to ovate-cordate, 

 dentate, sometimes obscurely 3-lobed, 1-3 cm. long, stellate-canescent; flowers 

 axillary; calyx-lobes 3-4 mm. long, lanceolate, in fruit reflexed; petals 3-5 mm. 

 long, brick-red or pinkish; fruit 7-8 mm. long and about as wide, minutely stel- 

 late. Dry soil: Tex. Colo. Ariz. Ap-S. 



FAMILY 82. HYPERICACEAE. ST. JOHN'S-WORT FAMILY. 



Herbs or shrubby plants, with opposite, rarely whorled, entire or nearly 

 so, pellucid-punctate leaves, without stipules. Flowers cymose, perfect, 

 regular or nearly so. Sepals 4 or 5, herbaceous, equal or unequal. Petals 

 4 or 5, yellow or flesh-colored. Stamens few or many, usually 3- or 5- 

 delphous. Gynoecium of several united carpels. Ovary 1-celled, with 

 parietal placentae, or 3-7-celled, with central placentae. Styles distinct or 

 united; stigmas often capitate. Fruit a septicidal capsule. 



1. HYPERICUM (Tourn.) L. ST. JOHN'S-WORT. 



Herbs (all ours), or shrubs. Leaves opposite, rather thick, usually sessile, 

 entire or nearly so, more or less punctate. Flowers cymose. Sepals 5, slightly 

 unequal. Petals 5, yellow, convolute. Stamens numerous, more or less dis- 

 tinctly 3- or 5-delphous. Ovary 1-celled, with 3 (all ours) or 5 parietal placentae, 

 or 3- or 5-celled. Styles 3-5, sometimes coherent. Seeds numerous. 



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



stamens numerous; erect perennials. 



Sepals acuminate or at least decidedly acute. 1. H. formosum. 



Sepals obtuse or acutish. 



Stem 3-5 dm. high; petals 8-10 mm. long. 2. H. Scouleri. 



Stem about 1 dm. high; petals 1015 mm. long. 3. H. Nortonae. 



Petals slightly exceeding the sepals; black glands none; stamens 5-20; annuals or no. 4 



often perennial, rooting at the nodes. 



Procumbent, often forming mats ; leaves broadly oval. 4. H . anagalloides. 



Erect and simple; leaves oblong to lanceolate. 5. H. majus. 



1. H. formosum H.B.K. Perennial, with a horizontal rootstock; stem 

 simple, 3-6 dm. high; leaves oval or elliptic, 2-3 cm. long, sessile; sepals 4-5 mm. 

 long, black-dotted on the margin and usually also on the back, acuminate or 

 acute; petals 10-12 mm. long, oval; capsule 3-lobed, 8 mm. long; stamens numer- 

 ous. Mountains and hillsides: N.M. Wyo. s Calif. Mex. Submont. Mont. 

 Jl-Au. 



2. H. Scouleri Hook. Perennial, with a horizontal rootstock; stem 4- 

 gonous above, 2-5 dm. high; leaves oblong or elliptic to ovate, somewhat clasp- 

 ing, 1-2 cm. long; sepals ovate, obtuse, with a few black dots along the margin; 

 petals 8-10 mm. long, oval; capsule 3-lobed; stamens numerous. Copses and 

 hillsides: Mont. Wyo. Calif. B.C. Submont. Mont. 



3. H. Nortonae M. E. Jones. Perennial, with a slender rootstock; stem barely 

 angled; leaves oval or rounded-oval, obtuse, 1.5-2.5 cm. long, cordate at the 

 base; flowers 1-3; sepals ovate-obtuse, about 2.5 mm. long; petals narrow, 

 strongly many-nerved; pod 3-lobed at the apex. Moist alpine places: Mont. 

 Alp. 



4. H. anagalloides Cham. & Schlecht. Diffusely branched annual or 

 perennial, rooting at the nodes; branches 5-30 cm. long, procumbent or ascend- 

 ing; leaves elliptic to broadly oval, 5-7-ribbed, 5-15 mm. long, not dotted; 

 sepals elliptic, unequal; petals 3-4 mm. long, oval; stamens 15-21, in 3 clusters; 

 capsule 1-celled, ovate. H. tapetoides A. Nels. Wet ground: B.C. Mont. 

 Ida. L. Calif. Je-Jl. 



5. H. majus (A. Gray) Britton. Erect annual, simple below; stem 2-9 dm. 

 high; leaves lanceolate or oblong-lanceolate, 2-6 cm. long, 5-7-ribbed; sepals 





