205 
6. Transverse sections of stem 22, showing ventral callosity from which the 
root-hairs arise. 
7. Antheridium. x 40. 
8. Median sagittal section of perigynium and adjacent portions of stem, showing 
embryo sporogonium with capsule, seta, foot,and “involucellum,” also unfertilized 
archegonia, perianth, insertion of involucral leaves, root-hair callosity, etc. < 23 
(slightly schematized). The free part of the perianth as drawn here and in the next 
is proportionally rather too short and not sufficiently inflated below. 
9. Sagittal section of mature perigynium from which the seta has been detached, 
showing fully developed calyptra and the unfertilized archegonia raised upon the base 
of its free portion, s< 20 (slightly schematized). 
10. Surface view of embryo capsule, exhibiting the spiral lines, which presumably 
bound the valves. KO: 
II, Valves of capsules, showing position taken by them when moistened. >< 12. 
12. Apex ofasingle valve. >< 12, 
13. Base of dehisced capsule from above, showing spiro-radial insertion of valves. 
X 36. . 
14. Cells of inner surface of capsule valve. >< 150. 
15. Elater and spores. > 137. 
CoLUMBIA UNIVERSITY, DEPARTMENT OF BOTANY, 
April 9, 1897. 
Notes on the American Hydnaceae.—I. 
LuciEN MARCUS UNDERWOOD. 
KNEIFFIELLA. 
The revival of Kneiffia Spach, Hist. Veg. Phan. 4: 373, 1835, 
as a genus of Epilobiaceae, necessitates the selection of a new 
name for the hymenomycetous genus of the same name founded by 
Fries three years later.* The genus belongs with a group of Te- 
Supinate plants usually classed with the Hydnaceae, but forming 
outliers from the typical members of the family in the direction 
of the simpler Tomentellaceae. Three species are reported from 
the United States and others are found in the West Indies and 
elsewhere. The synonymy of the American species is here re- 
corded since it becomes necessary to use them ina publication 
elsewhere that might not be desirable as a medium of publishing a 
new names since it has primarily a circulation that is not botanical. 8 
rey 
* Kneifia Fr, Epicrisis systematis Mycologici, 529. 1836-1838. 
