52 ZYGNEMATACEAE 



Descriptions of Species 



1. Zygnemopsis sikancensis Li 1939. Bull. Fan Mem. Inst. Biol., 



Botany. 9, p, 225. 



Vegetative cells 4-6 /^i x 38-68 m, each with 2, sometimes 4, chro- 

 matophores; conjugation scalariform; zygospores quadrangular-ovoid, 

 1 8-22 M X 1*6-22 ix, filling the tube and extending into the gametangia; 

 median spore wall yellow and punctate. (PI. VIII, Figs. 1-2.) 



China, Sikang, Yunnan. 



2. Zygnemopsis orientalis (Carter) Transeau 1944. Ohio Jour. 



Sci. 44, p. 244. Records Bot. Surv. India. 9, p. 281. 1926 

 (as Debarya desmidioides var. orie?itale Carter). 



Vegetative cells 6-7/^ x 30-67/1; conjugation scalariform; zygo- 

 spores quadrangular, pillow-form, 20-25 /a on a side, filling the broad 

 tubes and dividing the gametangia; median spore wall golden-brown, 

 whether smooth or punctate not stated. (PI. VIII, Figs. 3-5.) 



India, Matiana on the Tibetan road from Simla, altitude 8,500 feet, 

 April 30, 1907. 



3. Zygnemopsis gracilis Randhawa 1938. Proc. Indian Acad. Sci. 



8, p. 133, Fig. 18. 



Vegetative cells 6-7 /j. x 40-70 /x; reproduction by aplanospores 

 formed in spindle-shaped sporangia, with spores in the median region; 

 spores globose to ovoid, about 20 jx in diameter; color and markings on 

 the median wall undetermined. (PI. VIII, Figs. 6-7.) 



India, Makrahi, Fyzabad, U.P., March 12, 1938. 



4. Zygnemopsis floridana Transeau 1934. Trans. Amer. Micros. 



Soc. 53, p. 215, PI. 18, Fig. 20. 



Vegetative cells 7-8 /x x 30-40 (-50) m; chromatophores 2, pillow- 

 form, each with a pyrenoid; conjugation scalariform; zygospores 

 formed in the greatly enlarged conjugating tubes and extending but 

 little into the gametangia which lengthen during conjugation to 50-90 jia; 

 spores ovoid to quadrate-ovoid, 18-25/1 x 28-30/1; median spore wall 

 bright yellow, scrobiculate; pits 2-3/1 in diameter and about the same 

 distance apart. (PI. VIII, Figs. 8-9.) 



United States: Florida, Fort Myers, May 25, 1933 (Blaydes Coll.). 



5. Zygnemopsis minuta Randhawa 1937. P^oc. Indian Acad. Sci. 



5, p. 312, Fig. 8. 

 Vegetative cells 8-1 2 /t x ^0-70/1, each with 2 compressed-ovoid 

 chromatophores; conjugation scalariform, dissociation occurring dur- 

 ing or after conjugation; zygospores globose to quadrate-globose. 



