Myriophyllum heterophyllum, Michx

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 312

publication ID

https://doi.org/10.5281/zenodo.293200

persistent identifier

https://treatment.plazi.org/id/03B0402C-FE8F-E226-F8E7-F91BD7BDF613

treatment provided by

Plazi

scientific name

Myriophyllum heterophyllum
status

 

5. M. heterophyllum Michx View in CoL , FI. Bor. Amer. 2: 191 (1803).

Stems up to 100 cm. Leaves 4-6 in a whorl, either pinnatisect, with 5-12 capillary segments, or lanceolate to linear and serrate. Spike 3-35 cm, with solitary flowers borne in the axils of lanceolate bracts. Flowers hermaphrodite, or occasionally female at base of inflorescence, male above. Petals 1*5-3 mm. Stamens 4. Fruit 1-1*5 mm, subglobose, each nutlet beaked and with 2 ridges on the outer face, finely tuberculate. Naturalized in S.E. Austria. [Au Br.] (E. North America.)

The pinnatisect leaves develop when the plant grows in low temperatures (15° C or less), and entire leaves develop when the plant grows at higher temperatures; intermediate leaves are few.

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Saxifragales

Family

Haloragaceae

Genus

Myriophyllum

Loc

Myriophyllum heterophyllum

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A. 1981
1981
Loc

M. heterophyllum

Michx 1803: 191
1803
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