366 MR. JAMES GROVES: 
9. NITELLA MUCRONATA Miquel, sens. lat. 
3. Chiplun, 1914. S. P. Agharkar. 
6. Benares. B. Sahni. 
Gonda, Oudh, 1922, nos. 5, 8, 11, 16. G. O. Allen, 
9. Noung Shong Khong, Manipur, 3900', 1882, nos. 6306-7 ; Lareain, 
Manipur, 1882, no. 6296 (part); Kittiemala, Manipur, 1882, 
no. 6820 (part)? Sir G. Watt. 
Katha, 1904, no. 22666; Kawkaveik, 1904, no. 24474. 7. H. Burkill. 
The above represent a series of slightly different forms which, from the 
material at present available, I can only refer to N. mucronata in a broad 
sense. The doubtful plant from Manipur under no. 6820 shows a resem- 
blance to N. oligospira, but some of the ultimate rays are 3-celled and few 
are much abbreviated. There is a considerable difference between the deco- 
ration of the oospore-membranes of the several plants here included under 
N. mueronata, some having the well-marked regular reticulation of the 
European plant, while in others the protuberant portions are only imperfectly 
connected. 
N. mucronata, including its subspecies, is widely distributed, occurring in 
most parts of Europe and in Asia, Africa, and North America. 
6. N. PSEUDO-FLABELLATA Braun. 
Recorded by Braun from (8) Chittagong, and from Java, Borneo, and 
China. 
Further investigation is necessary as regards this rather ambiguous species. 
In the “ Fragmente ” from which the name must date N. pseudo-flabellata, with 
the exception of forma mucosa Nordst., is treated as gymnocephalous, but, in 
order to be sure of this character, the plant must be observed in its early 
stages, as later on in some at least of the gleocephalous species the mucous 
cloud is not apparent. This fact has probably led to some confusion. 
Dr. Allen regarded the elongated primary ray as an important character, 
but included the gloeocephalous plants, here separated as N. mucosa. The 
larger number of rays especially at the second and ultimate fureations and 
the greater number and approximately equal length of the uniformly 2-celled 
dactyls seem to distinguish it from N. mucronata. 
7. N. mucosa J. Groves. N. pseudo-flabellata f. mucosa Nordst. 
10 or 11. Galang, Malay Peninsula, 1899, no. 10827. H. N. Ridley. 
11". Cluny Lake, Singapore, 1920. T. F. Chipp; 1923, no. 10016. 
R. E. Holttum. 
An immature plant collected by Sir G. Watt in 1885 below Simla at 
4000' probably also belongs to this species. 
N. mucosa was originally described as f. mucosa from New Zealand ; 
vlants apparently referable to it have been collected in Ceylon, Japan, and 
Tonkin. 
