48 ORDER 16. HYPERICACE^E. 



3 H. Carolintanum MX. Villous, simple, erect ; fls. all large, petahferons and snb- 



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

 woods. South. 812'. April, May. 



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



few or solitary, pedicellate (7"), terminal. Fla. in sand. 3 (>'. Apr. (H. Can. 

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



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

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

 sta. 9 30 ; style filiform, straight ; cap. 1-celled, 3-valveW, mai 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. bubsessile ; sep. obtuse. Coasts, Me. to N. J. and Wise. In tufts, 7 10'. 



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



sorted, as long as the calyx ; sep. acutish. Shores, Vt. N. H. to Va. Delicate, fi'. 



3 H. moil t :i iia Nutt. Minutely pubescent ; Ivs. filiform-subulate : pedicels longet 



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



ORDER XVI. HYPERICACE^E. ST. JOHN'S we JITS. 



Herbs or shrubs with opposite, entire, dotted, exstipulate leaves, whhfloic- 

 >--rx perfect, regular, hypogynous, 4 or 5-merous, cymous and mostly yellow ; 

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

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

 with styles united or separate, becoming in fruit a 1-celled capsule with 

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

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



Sepals4. Petals 4, oblique, contorted in a-stivatinn, yellow ASCYRUM. 1 



Sepals 5. Petals 5, a oblique, contorted in a>stivntion, yellow HYPKRICDM. 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 

 broach. 



The outer pair of sepals a very large, ovate. Styles 1 or 2 Nos. 1, 9 



a still larger, orbicular. Styles 8 Nos. 3, 4 



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



' A. Crnx-Andreae 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. 612". Jn. Sep. 

 ft. ansrtitifolia. Lvs. smaller (3 6"), crowded ; bractlets close to the fl. Car. G.i. 



'3 A. i> fi mil 11 in MX. 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. slaii* 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 16". Jn. Aug. 



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

 Ing: caps, oblong; bracteoles 0. Ga. apd Fla. 1 to 2f. Lvs. 8 12". Apr. Sep. 



'* A. mlcrosepalum Torr. and Gr. Lvs. oblong-linear, crowded; sep. much sho.-tpi 

 than the obovate. nneqnal petals. Bushy. 1 9-f. Lvs. 3 0" 



