274 Mr. Bentuaw’s Review of the Order of Hydrophyllee. 
Folia pinnatim dissecta, inferiora opposita. Pedunculi inferiores oppositifolii, 
superiores in racemo laxo unilaterali simplici dispositi. 
1. E. NverELEA (Linn. Gen. 97.), petiolis exappendiculatis, foliis pinnatifidis, 
lobis subincisis, calycibus fructiferis valde auctis. 
Calycis fructiferi segmenta ovato-lanceolata, acuta, foliacea, semipollicaria. 
(v. s. c.) 
I only know this plant from specimens gathered in European botanic gar- 
dens. It is said to grow on the Potowmac in Virginia, and on the Missouri. 
2. E. ampiaua (Nutt. Gen. i. 118.), “decumbens, ramosa ; caule glabro sub- 
glauco, foliis hirsutis lyrato-pinnatifidis subsessilibus, segmentis sublan- 
ceolatis angulato-dentatis lobatisve, racemis oppositifoliis lateralibus ter- 
minalibusque, corollis parvis calyce vix longioribus, segmentis emargi- 
natis. 
* Common in alluvial soils on the banks of the Missouri." 
I am wholly unacquainted with this plant. 
3. E. MEMBRANACEA, glaberrima, petiolis exappendiculatis, foliis pinnatifidis, : 
segmentis integerrimis, calycibus vix auctis. 
Folia tenuia, lobis divaricatis lato-lanceolatis obtusis. Flores parvi, pedicel- 
lati, laxe racemosi. Corolla alba. (v. s. sp.) 
From Mr. Douglas's Californian collection. 
4. E. CHRYSANTHEMIFOLIA, hispido-scabra, petiolis basi auriculato-dilatatis, foliis 
subbipinnatifidis, lobis inciso-dentatis obtusis, calycibus fructiferis parum 
auctis.—Flores E. membranacee. Corolle squame dentate. (v. s. sp.) 
From California. Douglas. 
III. Ngworurina. Barton. 
Calycis sinus dentibus reflexis appendiculati. Squamæ corolline 10, breves, 
vel nulle. Stamina corolla subbreviora. P/acente maximae, dorso liberze, 
ovarium implentes, 2—12-ovulatz. 
Herbe annuz, diffuse, fragiles. Folia inferiora opposita, omnia pinnatifida. 
Pedunculi nunc axillares, uniflori, nunc pauci ad apices ramorum in race- 
mis brevibus dispositi. 
