| Family |
Alismataceae |
| Scientific name |
Sagittaria graminea Michaux subsp. weatherbiana (Fernald) R. R. Haynes
& Hellquist |
| Synonyms |
Sagittaria graminea Michaux var. weatherbiana (Fernald) Bogin; Sagittaria
weatherbiana Fernald |
| Common name |
(Japanese common name) nagaba-omo-daka (ナガバオモダカ, 長葉面高 [meaning: long leaved
face with craning neck]) |
| (English common name) Weatherby's arrowhead |
| Distribution |
(Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) [native] USA |
| Habitat |
Swamp |
| Chromosomal number |
2n=22 |
| Description |
Plants 20-60cm or over. Leaves 10-25cm long, 1-2.5cm wide. Scapes 15-70cm.
Flowers white ca. 1.5cm, flowering in April to September. Perennial plants. |
| Reference |
Sagittaria graminea Michx. subsp. weatherbyana (Fernald) R. R. Haynes &
Hellq. |
| Sagittaria graminea Michx. var. weatherbiana (Fernald) Bogin |
| Sagittaria graminea Michaux |
| Sagittaria graminea Michx. var. weatherbiana (Fern.) Bogin |
| Note |
Naturalized plants (forst discovered at Kyoto in 1970th). Only female plant
is naturalaized in Japan. |
Sagittaria graminea subsp. weatherbiana = phyllodia 1-2.5cm wide, Sagittaria graminea subsp. graminea = phyllodia 1cm wide and Sagittaria graminea subsp. chapmanii = phyllodia 1cm wide.
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