HYPERJCACEjE. 215 



Plate 94. 



ELODEA, Adans. 



Sepala 5. Petala 5, asquilatera, inappendiculata, aestiva- 

 tione imbricata, decidua. Glandulae squamiformes 3, pha- 

 langibus staminum ssspissime 3-andris alternse. Capsula 3- 

 locularis. — Flores rubelli. 



Elodea, Adans. Fam. 2. p. 443. Pursh, Fl. 2. p. 479. Nutl. Gen. 2. p. 



17. Spach, in Ann. Sci. Nat. 1. c. Torr. & Gray, Fl. N. Am. 



1. p. 167. Endl. Gen. 5465. (excl. § b. c.) 

 Hyperici Sp., Linn., Michx. 



Hyperici Sect. Elodea, Chois. Prodr. Mon. Hyp. p 43, & in DC. 1. c. 

 Triadenium, Raf. in Med. Repos. hex. 6. 2. p. 350. 

 Martia, Spreng. Syst. 3. p. 333. 



Marsh St. Jolin's-wort. 



Calyx persistent, of 5 nearly equal nervose-striate sepals, 

 erect, chartaceo-herbaceous, quincuncially imbricated in aes- 

 tivation, persistent. Petals 5, hypogynous, ovate or spatu- 

 late, equal-sided, not appendiculate, imbricated in aestivation 

 (two exterior and two interior), spreading in anthesis, other- 

 wise erect, deciduous. Stamens 9 (rarely 12 or 15), triadel- 

 phous, not longer than the calyx, hypogynous ; the phalan- 

 ges placed opposite the dissepiments, one before each exte- 

 rior petal, and the third between the third and fifth petals : 

 filaments united for one third or half then length, then 

 linear-filiform, persistent : anthers globular, didymous, in- 

 trorse, apiculate with the glandular apex of the connective, 

 the cells opening longitudinally. Hypogynous glands 3, 

 conspicuous, interposed between the phalanges of the sta- 

 mens, ovate, fleshy and nectariferous (orange-colored). Ovary 

 ovoid-oblong, three-celled by the junction of the thick pla- 

 centas in the axis : styles 3, subulate, stigmatose down the 

 inner side. Ovules numerous, in three or more series on 

 each placenta, horizontal, anatropous. 



Capsule oblong, chartaceous. three-celled, many-seeded. 



