— 93 - 
foot-note appended to the final paged proof of the article recorded the detection 
of a character that might justify the specific segregation of the Texan plant. 
The Texan specimens, sent in a living condition by Dr. M. S. Young, bore mature 
sporogonia, and, as no antheridia were discovered, the plants were at first assumed 
to be dioicous, like the plants of southern Europe and northern Africa. It was 
remarked that “antheridial individuals have not been found,” and that “it is 
fioped that these will soon be met with in Texas or that they may appear in the 
thriving cultures of the plant that have been established in the propagating houses 
of the New York Botanical Garden.” 
About the middle of September it was noted that these living specimens at 
the New York Botanical Garden showed numerous young sporogonia and, also 
that there were no obvious antheridial receptacles. Cross sections of the thalli 
showed that rather inconspicuous antheridia were present intermingled with 
the archegonia, the elevated cylindric antheridial ostioles looking much like the 
snouts of the archegonial or sporogonial involucres, though remaining more 
slender. It might not be safe to prophesy what a study of the living Oxymitra 
of other parts of the world might disclose in respect to this character, but an 
examination of such dried specimens as are available (often not at all satisfactory 
for the determination of antheridia) and a perusal of the accessible literature on 
the subject would indicate that Oxymitra as elsewhere known is a dioicous plant. 
It may be remarked that even when, as sometimes happens, the Texan plant 
produces numerous- antheridia and only occasional archegonia, the antheridia 
and their involucres remain essentially free, like the archegonial involucres, in 
the median sulcus, and are not imbedded in a sharply defined antheridial recep- 
tacle as is the case in the dioicous Oxymitra paleacea. The large spores and the 
somewhat peculiarly thickened rays of the “stars” bounding the stomata have 
been alluded to in the preceding paper. Under the circumstances, it seems best 
to give the Texan plant a distinctive specific name and its more important diag- 
nostic characters are summarized below: 
Oxymitra androgyna sp. nov. 
Thalli 1-3 times dichotomous, mostly 8-18 mm. long, loosely gregarious or 
closely aggregated in more or less rosette-like masses; principal segments oblong, 
quadrate-oblong, or subovate, 4-7 mm. broad, 2-3 mm. thick, VS—V2 of this 
thickness occupied by the air-chamber layer, the median sulcus deep, acute, and 
sharply defined; latero-ventral scales numerous and conspicuous, projecting far 
beyond the margins, lanceolate or ovate with long-acuminate or filiform-acumin- 
ate apices, 2-4 mm. long, hyaline throughout, or reddish brown at base; rays of 
the stomatal stars strongly thickened, ovoid, dome-shaped, or lanceolate-acumin- 
ate in surface view; synoicous, with an occasional tendency to dioicism; antheridia 
intermingled with the archegonia at the bottom of the median sulcus or often 
somewhat laterally disposed in relation to the archegonia, the elevated antheridial 
ostioles cylindric or conic-cylindric, mostly o. 5-0.7 mm. high and 85-110,11 broad, 
decolorate or light brown; sporogonial involucres rostrate, obscurely trigonous- 
pyramidal, conic-cylindric, or cupolate-ovoid, 1. 1-2.0 mm. high, o. 8-1.0 mm. 
broad, lightly 8-12-ribbed; spores finally very dark and opaque, 125-175^ in 
maximum diameter, angular, the outer face bearing areolae 24-35 \x broad, ex- 
hibiting in profile a few verrucae 2-5/^ high, the inner faces smooth. 
The type material is preserved in the herbarium of the New York Botanical 
Garden, in the Propagating House of which it was collected on September 23, 
