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(First upload on September 12 2009. Last on June 13 2022) [ 日本語 | English ]

Zosteraceae (アマモ, seagrass)

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[Engler's syllabus エングラー体系] Engler did not establish this family (⇒ Potamogetaceae) Ten or more species in two genera → living in sea

Zostera L. (アマモ, grass-wrack) Phyllospadix Hooker (スガモ, surfgrass) Body: dioecism Leaf margin: serrulated Two species (and one hybrid):

P. iwatensis Makino (スガモ) P. japonicus Makino (エビアマモ), not in Hokkaido P. × choshiensis Miyata et Ohba (ヒメスガモ) Heterozostera (Setchell) Hartog Usually treated as Zostera

Phyllospadix iwatensis in Hokkaido

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Sugamo (スガモ, 菅藻), surfgrass Lifeform: perennial seagrass Distribution: north China - Korea - Japan Habitat: reefy zone (seashore, 海浜) ⇔ silt (sand and mud) = Z. marina 一般教育演習 海と湖と火山と森林の自然 Seed dispersal: water

Makino, T. 1931. A contribution to the knowledge of the flora of Nippon. Journal of Japanese Botany 7: 15-18

1 2 3 4
[1] a beached specimen. [2] close-up to roots. Along Charatsunai seacoast near Muroran Marine Station (see below) on Sept. 7 2009. [3] a specimen collected at Aikappu Cape (愛冠岬), Akkeshi, eastern Hokkaido, on June 21 1982. [4] a specimen collected at Denshinhama Coast, Muroran, on May 25 1982.

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[3] the landscape of Charatsunai seacoast. [4] a supervisor, Dr. Nagasato, the Madonna of the Japanese Society of Phycology, at a field trip. (September 7 2009).