acute at apex, the margins strongly revolute, sessile, subauriculate and clasping at 

 the base, the solitary midnerve beneath keeled and continuous into the wing on the 

 stem, with fascicles of smaller leaves in their axils; flowers numerous in terminal 

 or axillary dichotomous cymes, the bracts subulate and about 3 mm. long; sepals 

 ovate to elliptic or oval, to 3 mm. long and 1.5 mm. wide; petals yellow, convolute 

 in bud, obliquely cuneate to obovate, 5-10 mm. long; filaments elongate; styles 3, 

 coherent, somewhat persistent, the stigmas minute; capsule globose to globose- 

 ovoid, to 7 mm. long, 3-lobed, 1 -celled; seeds wrinkled. 



In sandy soils in savannahs, evergreen shrub bogs and ditches, rare in extreme 

 s.e. Tex., June-Aug.; from Fla. to Tex., n. to N.C. 



The peculiar thin-tissued, somewhat auriculate-clasping base of the leaves, and 

 the keeled midnerve that continues into a stem-wing, distinguish this species. 



11. Hypericum setosum L. 



Plant herbaceous, scabrous-tomentose to -pilose throughout, the stem simple or 

 sometimes virgately branched, to 75 cm. high; leaves sessile, numerous, erect- 

 appressed. ovate to linear-oblong or lanceolate, acute at apex, the margins some- 

 what revolute, to 15 mm. long and 4 mm. wide, gradually reduced up the stem; 

 flowers few in cymes; sepals ovate to ovate-lanceolate or elliptic, acute to acuminate, 

 to 4 mm. long, conspicuously ciliate; petals yellow, 5-6 mm. long, obliquely oblong- 

 elliptic, obtuse; styles 3, subpersistent; capsule ovoid-oval, 4-5 mm. long. 



In bogs and wet pinelands in s.e. Tex., June-Sept.; from Fla. to Tex., n. to Va, 



12. Hypericum mutilum L. Fig. 526. 



Plant annual or perennial, 3-9 dm. high, with weak slender erect to ascending 

 stems, widely branching above, sometimes forming extensive colonies, often with 

 leafy-bracted decumbent bases; leaves ovate to lanceolate or narrowly oblong, 

 sessile and partly clasping at base, rounded to broadly obtuse at apex, mostly 

 5-nerved, to 35 mm. long and 15 mm. wide; cyme in well-developed plants diffuse 

 and somewhat leafy-bracted, the ultimate bracts setaceous; flowers light-yellow, 

 about 4 mm. across; sepals variable in length and size, linear to linear-lanceolate or 

 elliptic-oblanceolate, equal to or much-exceeding the capsules; stamens 6 to 12; 

 capsules subglobose to short-ellipsoid, the rounded summit capped by the short 

 persistent styles that are about 1 mm. long. 



On the edge of and in water of streams, ponds, swamps, marshes and other wet 

 situations in e. Okla. (Adair, Delaware, LeFlore, Mayes, McCurtain, Pushmataha 

 and Sequoyah cos.) and cen. and e. Tex., May-Oct.; from Fla. to Tex., n. to s. 

 N.E., cen. N.Y., O., 111., Mo. and Kan.; introd. in Calif, (fide Mason). 



Those plants with sepals broadly lanceolate to oblong and foliaceous have been 

 segregated as var. latisepalum Fern. 



13. Hypericum gymnanthum Engelm. & Gray. 



Plant herbaceous, almost simple, with strict stem and branches, to 9 dm. high, 

 usually much smaller; leaves firm, clasping, 5- to 7-nerved, deltoid-cordate, acute 

 to obtuse at apex, about 15 mm. long and 1 cm. wide below middle; cymes naked, 

 elongated, the floral leaves reduced to small subulate bracts 3-4 mm. long; sepals 

 thickish, erect, lanceolate, acuminate, 3-5 mm. long; petals 3-6 mm. long; stamens 

 10 to 12; styles 3, persistent, about 0.75 mm. long, the stigmas only slightly 

 dilated; capsule ellipsoid-conical, pointed, about 4 mm. long. 



In sandy soils in bogs, savannahs, barrens or low ground in s.-cen. and s.e. Tex., 

 June-July; from Fla. to Tex., n. locally to N.Y., N.J., Pa., W.Va., O., 111., Mo. 

 and e. Kan. 



1137 



