ON ACNIDA. 311 



I suppose is not distinct from Moquia"s own A. tiiberculata. This 

 belongs mainly to the banks of rivers and lakes. 



When I published the second edition of my "Manual of the 

 Botany of the Northern United States," I had in cultivation, from 

 Tendler's seeds, the Amarantm tamariscinwi of Nuttall, which I saw 

 had the characters of Aenida, sect. Montelia of Moquin-Tandon, except 

 that the utricle was circumscissile in the manner of a true Amarantus. 

 Whereupon, having adopted Euxolus, I followed up Moquin's hint, 

 and set up Montelia as a genus, upon what I took to be one polymor- 

 phous species; having, by a sad oversight, confounded Moquin's 

 Montelia, which has a small and indehiscent utricle, with my M. 

 tamariscina, the utricle of which dehisces transversely, and which like- 

 wise has far more slender fertile inflorescence. 



While correcting this gross mistake, I wish also to direct the 

 attention of our botanists this summer to the coast species of Acnida, 

 and to request that specimens be prepared, and also critically 

 examined when fresh, with the view of soon determining whether I 

 am justified in my belief that we have three genuine species on the 

 Atlantic coast, or within reach of tidal water. If my present opinion 

 is well founded as to the species, and as to the extent of the genus, 

 the arrangement should be somewhat as follows : — 



^: 



''Acnida {Acnide, Mitchell), Linn. 



(1.) EuACNiDE. — Utricle somewhat fleshy, indehiscent, large, i.e. 

 one and a half to two lines long. 



A. rhyssoca^-pa, alias rusocarpa, Michx. — Fertile inflorescence very 

 naked; the bracts not half the length of the fleshy utricle, the 

 angles of which are not rarely rugose-tuberculated ; stigmas compara- 

 tively short and slender-subulate. Salt marshes, New England to 

 Georgia. 



A. cannalina, L. — Fertile inflorescence slender or sometimes 

 glomerate ; utricle thinner and smaller, with acute and smooth angles, 

 much exceeding the bracts ; stigmas very long and filiform, almost 

 plumosely hairy. Salt marshes and river-banks, even beyond brackish 

 water, New England to Georgia, West Indies (?), etc. 



A. australis, n.sp. {A. cannahina. Chapman, S. Flora). — Panicled 

 spikes of the fertile inflorescence dense, linear- cylindrical ; utricle 

 smooth, thin, hardly at all fleshy, acute-angled, little if at all ex- 

 ceeding the imbricated bracts ; stigmas setaceous, rather short 

 Florida, at Apalachicola, Dr. Chapman ; Biscayan Bay, Dr. Palmer, 

 coll. no. 462, 



(2.) Montelia, Moquin-Tandon. — Utricle thin and small (half to 

 two-thirds of a line long), punctate-rugose or roughish indehiscent, 

 equalled or exceeded by the cuspidate -tipped bracts ; stigma slender, 

 filiform, almost plumosely hairy. 



A. tuherculata, Moquin-Tandon, in DC. Prodr. A. rusocarpa, 

 Moquin-Tandon, I.e., not of Michx. A. cannahina, var. concatenata, 

 Moquin-Tandon, I.e. Amarantus Miamensis, Riddell, Synopsis. Mon- 

 telia tamariscina, Gray, Man. Bot. ed. 2, 370, and ed. 5, 413, partly, 

 especially the var. concatenata. River-banks, shores, «&;c., in the 

 interior. Lake Champlain to Iowa and Texas. Sometimes erect. 



