Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Sagittaria guayanensis

guyanese arrowhead

Sagittaria guayanensis
Distribution
from FNA
LA; Mexico; West Indies; tropical regions; Asia; Africa [Introduced, North America]
[BONAP county map]
Discussion

The name has often been spelled guyanensis (K. Rataj 1972), which is incorrect. Sagittaria guayanensis was the spelling in the protologue. The holotype was collected by Humboldt and Bonpland in Colombia, not Guyana. The type citation is Colombia: Guainia: in wetlands near the sugar mill of Don Felix Farreras and the city of Bolivar. The type is supposedly at Paris, as with all HBK types; however, we (with the help of Alicia Lourteig) have been unable to locate it. MO has a fragment, however. Rataj did designate a neotype: Suriname, Hostman 870 (TCD!). The fragment at MO takes precedence over this neotype.

Sagittaria guayanensis was divided into two subspecies, S. guayanensis subsp. guayanensis from the Neotropics and subsp. lappula (D. Don) Bogin from the Paleotropics. The two subspecies were separated by the shape and size of the fruit in addition to their distribution. Sagittaria guayanensis subsp. lappula has compressed achenes longer than 2.5 mm, whereas subsp. guayanensis has plump achenes shorter than 2.5 mm (C. Bogin 1955).

Subspecies 2 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 22.
Parent taxa Alismataceae > Sagittaria
Sibling taxa
S. ambigua, S. australis, S. brevirostra, S. cristata, S. cuneata, S. demersa, S. engelmanniana, S. fasciculata, S. filiformis, S. graminea, S. isoetiformis, S. kurziana, S. lancifolia, S. latifolia, S. longiloba, S. montevidensis, S. papillosa, S. platyphylla, S. rigida, S. sanfordii, S. secundifolia, S. subulata, S. teres
Subordinate taxa
S. guayanensis subsp. guayanensis
Name authority Kunth: in A. von Humboldt et al., Nov. Gen. Sp. 1: 250. (1816)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers