9(8). Mature capsules exceeding 7 mm. in length and 3.5 mm. in width, lance- 

 ovoid; flowers in 1- to 7-flowered terminal and subterminal dicha- 

 sia, the inflorescence usually narrow and compactly thyrsoid; 

 stamens 5-8 mm. long; seeds dark-brown or black, 1-1.7 mm. long 

 5. H. prolificum. 



9. Mature capsules 6 mm. or less long and 3 mm. wide, slender-conic; flowers 



in 7- to many-flowered terminal and subterminal compound dicha- 

 sia, the inflorescence presenting an obpyramidal aspect; stamens 

 3-4 mm. long; seeds reddish-brown, 0.8-1.3 mm. long (10) 



10(9). All flowers with only 3 styles present. ...4. H. densiflorum var. densiflorum. 



10. Some flowers with 4 or 5 styles present 4. H. densiflorum var. lobocarpum. 



11(3). Petals yellow or orange-color, convolute in bud; stamens numerous or 

 few, distinct or united at base into 3 to 5 clusters without interven- 

 ing glands; flowers terminal or in terminal cymes (12) 



11. Petals flesh-color to mauve-purple, imbricated in bud; stamens mostly 9, 



strongly triadelphous, with 3 large orange glands alternating with 

 3 bundles of stamens; flowers clustered in the axils and at summit 

 of stem (16) 



12(11). Stamens numerous, usually 20 or more; roots perennial (13) 



12. Stamens usually less than 20; annuals or rarely perennials (14) 



13(12). Stems and leaves copiously pilose; sepals ciliate; petals clear yellow.... 

 1 1. H. setosum. 



13. Stems and leaves glabrous; sepals glabrous; petals streaked with dark lines 



3. H. punctatum. 



14(12). Leaves subulate or subulate-linear, appressed or strongly ascending; stem 

 fastigiate-branching; root annual 14. H. Dnimmondii. 



14. Leaves flat, varying from suborbicular-ovate to linear-lanceolate, spreading; 



stem simple or loosely branched, from a slightly woody base (15) 



15(14). Diffusely branched; leaves ovate-oblong to shortly elliptic, rounded at 

 apex; capsule short-ellipsoid 12. H. mutilum. 



15. Simple or nearly so, virgate, the cymes with ascending branches; middle and 



upper leaves ovate-deltoid, tapering to apex; capsule slender-conical 

 13. H. gymnanthum. 



16(11). Leaves tapering below middle to a distinctly slender petiole 



16. H. Waheri. 



16. Leaves sessile at the rounded to cordate-clasping base (17) 



17(16). Leaves with translucent glands and dark-punctate on lower surface; 

 styles 2-3 mm. long 15. H. virginicum. 



17. Leaves without translucent glands or superficial dots on lower surface; styles 



1 mm. long 17. H. tubulosum. 



1. Hypericum anagalloides Cham. & Schlecht. Tinker's penny. Fig. 525. 



Weak annual with few to many erect or procumbent stems or forming dense 

 mats with ascending stems; leaves lanceolate to ovate, obtuse, 4-12 mm. long; 

 flowers small, terminal and solitary or in leafy cymose cluters or panicles; sepals 

 ovate, unequal in length, longer than capsule; petals orange-yellow (coppery); 

 stamens 10 to 20; capsule 1 -celled. 



About fresh-water streams and springs or in wet meadows or bogs in Ariz. 

 (Coconino Co.), May-Aug.; Mont, to B.C., s. to n. Ariz, and s. Calif. 



2. Hypericum formosum H.B.K. Fig. 526. 



Perennial herb with horizontal rootstocks; stems 2-6 dm. high, simple at base, 

 sometimes branched above, erect; leaves oval to elliptic or sometimes oblong-ovate, 



1130 



