48 . ORDER 16. HYPERICACE^. 



3 H. Carollnlanum Ms. Villous, simple, erect ; fls. all large, petaliferons and snb- 



terminal ; sepals acuminate ; Ivs. oblong-oval, edges denticulate, not revolute. Dry 

 woods, South. 812'. April, May. 



4 H. arenicola Chapm. Hoary-tomentons ; Ivs. lance-oblong, obtuse, small (9") ; fls. 



few or solitary, pedicellate (7"), terminal. Fla. in sand. 3 <K. Apr. (H. C ana- 

 dense, |3. obtusum Wood. Ed. 5th.) 



3. HUDSONIA, L. (In honor of William Hudson, author of Flora An- 

 glica.) Sep. 3, united at base, subtended by 2 minute ones outside pet. 5 ; 

 sta. 9 30; style filiform, straight; cap. 1-celled, 3-valved, mar.y- seeded 

 > with very numerous branches, minute leaves, and small, bright yellow 

 flowers. May. 



1 H. tomentosa Nutt. Hoary tomentous ; Ivs. ovate, appressed-imbricate, acute ; 



fls. subsessile ; sep. obtuse. Coasts, Me. to N. J. and Wise. In tufts, 710'. 



2 H. ericoides L. Hoary-pubescent; Ivs. subulate, a little spreading; pedicels ex- 



serted, as long as the calyx ; sep. acutish. Shores, Vt. N. H. to Va. Delicate, &. 



3 H. montana Nutt. Minutely pubescent; Ivs. filiform-subulate; pedicels longei 



than the flowers ; sep. acuminate, the outer ones longer, subulate. Mts. Car. 5'. 



ORDER XVI. HYPERICACE^E. ST. JOHN'S WORTS. 



Herbs or sJirubs with opposite, entire, dotted, exstipulate leaves, with flow- 

 ers perfect, regular, hypogynous, 4 or 5-rnerous, cymous and mostly yellow ; 

 sepals unequal, persistent ; petals mostly oblique or convolute in the bud ; 

 stamens few or many, polyadelphous ; anthers versatile ; ovary compound, 

 with st3 r les united or separate, becoming in fruit a 1-celled capsule with 

 parietal placentae, or 3 to 5-celled when the dissepiments reach the centre. 

 Seeds exalbuminous, minute. (Illust. 128, 129, 275.) 



Sepals 4. Petals 4, oblique, contorted in aestivation, yellow ASCTRUM. 1 



Sepals 5. Petals 5, a oblique, contorted in jest ivation, yellow HYPERICUM. 2 



a equilateral, imbricated in bud, purplish ELODEA. 3 



1. ASCYRUM, L. ST. PETER'S WORT. Sep. 4, the two outer usually 

 very large and foliaceous ; pet. 4, oblique, convolute ; fil. slightly united at 

 base into several parcels ; styles 2 4, mostly distinct ; cap. 1-celled. > 

 Lvs. punctate with black dots. Fls. pale yellow, 1 or 3 terminating each 

 branch. 



The outer pair of sepals a very large, ovate. Styles 1 or 2 Nos. 1, 2 



a still larger, orbicular. Styles 3 Nos. 3, 4 



a small, like the two inner. Styles 3, long, distinct No. 5 



1 A. Crux-Andrea; L. Branches many, suberect, ancipital above; Ivs. linear-ob- 



long, obtuse ; outer sep. twice longer than the pedicel ; 2 bracteoles a little below the 



flower. Sandy woods, N. J. to Ga. and La. 1 2f. Lvs. 6 12". Jn. Sep. 



ft. ang-ustifblia. Lvs. smaller (3 6"), crowded ; bractlets close to the fl. Car. Ga. 



2 A. pumiliim Ms. Low, trailing at base; Ivs. oval and obovate, obtuse, sessile; 



outer sepals shorter than the slender pedicel, inner sepal ; bracteoles 0. Ga. Fla. 



3 A. stans MX, St. erect, ancipital ; Ivs. oblong, sessile and half-clasping, obtuse ; 



caps, ovate, acute. Swamps, N. J. to Fla. and La. 1 to 3f. Lvs 10 15". Jn. Aug. 



4 A. amplexicaule MX. St. erect, terete below ; Ivs. broadly ovate, cordate, clasp 



ing ; caps, oblong ; bracteoles 0. Ga. and Fla. 1 to 2f. Lvs. 812". Apr. Sep. 



5 A. microsepalum Torr. and Gr. Lvs. oblong-linear, crowded ; sep. much shortei 



than the obovate, unequal petals. Bushy, 1 2f. Lvs. 36". 



