ON NAIAS GRAMINEA DEL., VAR. DELILEI MAGNUS, 819 
XI.—Tuae Anruerirerovus FLower. 
The male flowers are not so numerous as the female flowers, 
and they grow intermixed with them. Although I have frequently 
found plants of Naias graminea in which none but pistilliferous 
~plat could be detected at the period of exam siteseed such ten- 
owers Pers present. When the latter occurred on a plant 
_ pistilliferous flowers were invariably Pepe and oftener than not 
side by side with them (see figs. 67 and 6 
y observations of the anther do ot quite coincide with the 
descriptions and figure given by Dr. Magnus; I have somelas tly 
a larger number of illustrative drawings of thes Sa gy 
The drawing of Dr. Magnus is reproduced on Plate 252 in 
they are oval-shaped bodies borne upon 
very short stalk (see figs. 74 and 76). So much do they 
resemble t er of an ordinary flowering-plant that 
perianth. The perianth closely invests the anther 
throughout all its stages of growth, and, from all that 
I have seen, it keeps pace uniformly ‘with the growth of 
the membrane of the anther. 
The anthers of this genus, according to Dr. Magnus, 
are axis-growths which, when ripening, are pushed 
through the perianth, rupturing that membrane some- 
what irregularly, and they finally dehisce at their apex. 
That the anthers of the Reddish Longe dehisce at the 
apex there is no doubt, but I have seen no trace of the 
the flower and of the anther (fig. 76). The anther then 
becomes more elongate by its upward growth ; a slig ht 
2ro es its appearal 
with the principal dissepiment of the anther (fig. 68); the upright 
a > the keels lose their prominence, and the separate pollen- 
8 are not so distinguishable (fig. 77). Finally, the mature 
Gtiadriloculas anther is an ovoid a OS body having two narrow 
€s Covering the summit, and descending about half-way down 
¢ 
antheriferous flower of N. minor in Plate 251, fig. 17; a transverse 
section of N. major in fig. 18; a vertical section of N. major in 
