The genera Heteranthera of Pauisor DE BrEavvots, 
and Leptanthus of Micuavx, are perfectly synonymous, and 
considered by all authors as having, besides other characters, 
a capsule of three cells. The present individual having only 
one cell, WILLDENOW thought proper to construct a new 
genus for it, which he denominated Schéllera. It appears to 
me, however, that, by modifying the character of the genus 
_ Leptanthus, it may with propriety be allowed to remain as pe- 
-culiar to this species, the remaining Leptanthi of Micuaux 
being retained in the older established genus Heteranthera. 
Besides the more important character of the capsule, our Lep- 
_tanthus seems to differ remarkably in habit, and in the colour 
of its flowers, from the other individuals that have been ar- 
ranged with it. | 
This plant is a native of Pennsylvania and Virginia, ac- 
cording to Purso. Mr Murray of our Botanic Garden be- 
ing desirous to introduce the curious Valisneria spiralis to our 
collections from Canada, wrote to his correspondent Mr Kippin 
at Montreal, to request he would send some of the mud con- 
taining roots and seeds of that curious vegetable. Along with 
the Valisneria, there came up abundance of Najas canadensis 
and Leptanthus gramineus; the latter, alone, however, has at 
present produced flowers and seeds. 
The plant grows entirely submerged, and has a striking re- 
semblance, when out of flower, to the Potamogeton grami- 
neum. 
Fig. 1. Upper portion of a oy ak SIZE. Fig. 2, Flower, with its spatha. 
Fig. 3. Stamen. Fig. 4. Pistil. Fig. 5. Capsule, covered with the co- 
rolla. Fig. 6. Capsule laid open, to shew the insertion of the seeds. 
Fig. 7. Seed. Fig. 8. The same cut open vertical —More or less mag- 
— nified, 
