262 BOTANICAL GAZETTE [MARCH 
ascular anatomy of Ophioglossaceae.—Lanc™ has been investigating 
the vascular anatomy of the three genera of Ophioglossaceae, and in advance 
of the publication of the full papers he has made a brief statement of his con- 
clusions. It is becoming apart evident that the Ophioglossaceae are 
true ferns, and this return to the earlier views as to their relationships is 
emphasized by the present paper. The critical study of the anatomy of the 
in plan of stelar construction between the Ophioglossaceae and the Coeno- 
pterideae” (Botryopterideae and Zygopterideae). There are also features in 
common with the Osmundaceae and Hymenophyllaceae. When one considers 
the gaps in our knowledge of the extinct forms, it is safer to suggest relation- 
ship i in a general way than to be too Specific, and this attitude LANG has taken. 
He is convinced, further, that in the O p develop 
saesiotelat pith.—J. M. C. 
Vegetative reproduction in Angiopteris.—It has been known for a long 
time that the leaf stalk of Angiopteris is differentiated into two regions, a basal 
portion bearing stipules, and a midrib bearing pinnae, the two regions being 
separated by an abscission layer. From material in the garden and from a 
study of large specimens in the forest, VAN LEEUWEN% records the following 
observations: the foliage leaf persists for about two or three years and then 
breaks off at the abscission layer, the leaf base remaining many years longer; 
after the leaf has fallen, four resting buds appear on the leaf base, and when it 
finally falls off, one or more of the buds begin to grow and many develop into 
new plants. 
CIBORSKI first noticed such buds in Angiopteris; the present account 
gives additional information from plants growing under natural conditions.— 
CHARLES J. CHAMBERLAIN. 
Fossil prothallia—_McLEan™ has added to our meager knowledge of 
paleozoic prothallia by describing two female prothallia from the Lower Coal 
Measures of England. One is that of the classic Lagenostoma Lomaxii, and 
it resembles closely the female gametophyte of modern gymnosperms, the 
radial arrangement of the tissues suggesting centripetal growth by “alveoli.” 
This radial arrangement is lacking in such a gametophyte as that of Lepidocar- 
pon. The other gametophyte is that of Bothrodendron, one of the lycopods. 
It is extremely well preserved, and strongly resembles the emergent and 
24LanG, Witt1am H., On the interpretation of the vascular anatomy of the 
Ophioglossaceae. Mem. and Proc. Manchester Lit. and Phil. Soc. 56: no. 12 (pp. 14). 
Jigs. 6. 1912. 
25 VAN LEEUWEN, W. Docrers, Uber die vegetative Vermehrung von Angiopieris 
evecta Hoffm. Ann. Jard. Bot. Buitenzorg 10:202-209. pl. 18. 1912 
76 McLean, R. C., Two fossil prothalli from the Lower Coal icinlies New 
Phytol. sie gig-ark: ‘hes: 2. pls. 5, 6. 1912. 
