—25- 



ceraetery on a flat upland situated in the direct line of the valley 

 coming down from the mountainous region to the west, and when 

 later I visited the locality with Mr. Wheeler, it seemed to me 

 that the presence of the plant in so strange a place was to be ac- 

 counted for through the agency of wind-blown spores from the 

 higher region? above. Other instances might be cited, and no 

 doubt similar instances will suggest themselves to others, to 

 show that oftentimes new stations for rare or common plants 

 originate in this way. but this will suffice for the present. — Geo. 

 E, Davenport, Medford, Mass. 



A NEW QUILLWORT FROM MEXICO. 



IN March, 1895. I received from Mr. C. G Pringle a lot of Iso- 

 etes, one specimen of which, labelled Mexicana, proves dis- 

 tinct not only from that, but from all other described species. 

 As it was collected in the State of Mexico, Mex., the ancient seat 

 of empire of the Aztecs, the only North American people who 

 possessed an organized government and were at all advanced in 

 civilization, I deem it not inappropriate to name it/. Montezumce, 

 the Tsoetes of the Montezumas. 



Isoetes Montezumje n. sp. Terrestrial, polygamous, with 

 the aspect of I. Butleri ; trunk, very deeply bilobed, 10-15 mm 

 broad and high, the dead cortical layer persistent : leaves. 15-20. 

 8-14 cm high, very stiff, slender, erect, triangular, 1 mm wide 

 and .8 deep in the middle, with four stout bast- bundles and 

 many stomata ; dissepiments, thick, 6-12 cells wide ; sheaths, 

 hard, light -colored, rough on the back. 3 mm across the base, 

 lower part usuallj 7 turning black and persisting as a small scale ; 

 wings, 1 mm wide, disappearing at surface of the ground ; velum, 

 very narrow in the female, absent but edges of cavity sharp in 

 the male labium usually produced and covering fovea ; sporan- 

 gia. 5 mm x 3 mm with a few scattered brown spots ; macro- 

 spores, 350-460 //, rather sparsely beset with low, blunt tubercles, 

 naked for about 8 ^ from the equator; the tubercles are aften ele- 

 vated into i-pinules, and are sometimes retuse ; the equator is 

 wide, thin and fragile, the commissures lower and thicker : mi- 

 crospores, ashy, very large and rotund, often as broad as long, 

 averaging 40 x 35 varying in length from 35// to 48.4 fi, dense- 

 ly tuberculate or spinulose. 



