Myriophyllum ussuriense

Myriophyllum ussuriense (Regel) Maxim.:
Japan (Asia)
Russian Federation (Asia)
South Korea (Asia)
China (Asia)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Anhui, Guangdong, Guangxi, Hebei, Heilongjiang, Hubei, Jiangsu, Jilin, Jiangxi, Taiwan, Yunnan, Zhejiang [Japan, Korea, Russia].

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Plants dioecious, rarely monoecious or with bisexual flowers. Stem weak, 5-20 cm. Submerged leaves 3- or 4-whorled, pectinate, broadly lanceolate in outline, 5-10 × 2.5-5 cm; segments filiform, short, margin entire; emergent leaves 1 or 2, linear or lanceolate, minute, margin serrate to entire. Inflorescence of axillary flowers on emergent part of stem or a terminal spike; bracts and bracteoles elliptic, smaller than flowers, margin entire or serrate. Flowers 4-merous. Calyx tubular, shortly lobed. Petals pale reddish, obovate-oblong, ca. 2 mm. Stamens 8. Styles 4; stigmas white, long fimbriate. Fruit olive-brown, 4-loculed, subglobose, ca. 0.75 × 0.6 mm; mericarps finely tuberculate. Fl. May-Jun, fr. Jun-Aug.

Myriophyllum verticillatum Linnaeus var. ussuriense Regel, Mém. Acad. Imp. Sci. Saint Pétersbourg, Sér. 7, 4(4) [Tent. Fl.-Ussur.]: 60. 1861.

Muddy waterside shallows; near sea level to 1800 m.

The following is a representative barcode sequence, the centroid of all available sequences for this species.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 4
Species With Barcodes: 1

Canada

Rounded National Status Rank: N3 - Vulnerable

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G3 - Vulnerable