Ulva flexuosa Wulfen

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SOTANiCAL
ViARD&N
NEW YORK BOTANICAL GARDEN
02139075
Tseng, C. II. Stuuies on the Llarine
Chlorophy ceae from Hainan, II
Lingnan 3oi. Juurn. 17: 2, 142
June 1CJ38.
Enteromorpha flexuosa (Wulf.) J. Ag.
Till Alg. Syst. Ill, p. 12G, 1883.
Conferva jiexuosa Wulf., in Roth, “Cat. Bot 11,” p. 188, 1800.
TLe thallus is simple and tubular, cylindrical and smaller
downwards, gradually increasing upwards, becoming inflated and
flexuous. In surface view, cells are rectangular or polygonal, more
or Jess longitudinally arranged, about 8-16 m diam. The membrane
is about 20-24 n thick, with thicker inner walls about 7-8 m thick.
This species is very comnon on the Hainan coast. It is easily
distinguished from E. tubulosa Kuetz., which is also simple and
tubular, by its less distinctly longitudinally arranged cells and its
inflated upper portion of the thallus.
Habitat: On rocks and in rock pools in the upper littoral belt.
Kuan-nan, Wenchang, in March (Tseng 712, 716)-, Fung-chia Kang,
C'h’iung-tung, in March (Tseng 732) ; Seven Stones, Po-ngau Kang,
Loh-hwei, in December (Tseng 1817); Sin-ts’un Kang, Lengshui, in
April (Tseng 317); Sama, Yai Hsien, in January: West I. (Tseng
¿309) and East I. (Tseng 2362); Ying-kc-ha’, Yai Hsien, in February
(Tseng 2!,!,r>) and April (Tseng 890); Ch’angchiang, in May (Tseng
1)92); and Bakloi, Kan-en, in May ('Tseng 1003).
China : A new record.
Distribution : Widely distributed in warmer seas.
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