Flora of North America species comparison

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Bacopa eisenii

Bacopa egensis

Gila River water-hyssop, western hydranthele

Brazilian water-hyssop
Habit Perennials. Perennials.
Stems

prostrate, 15–60 cm, hairy.

prostrate, 15–30 cm, hairy.
Leaves

hairy;

blade base broadly cuneate to truncate, margins entire, apex rounded.

glabrous;

blade base narrowly cuneate, margins crenate, apex rounded with a narrow petiole-like base.
Pedicels

17–51 mm.

10–12 mm.
Flowers

sepals 5, ovate to oblong, calyx bilaterally symmetric;

corolla white with yellow throat, 10–14 mm;

stamens 3, equal.

sepals 4(or 5), ovate to oblong, calyx radially symmetric;

corolla white with yellow throat, 3–5 mm;

stamens 3 or 4, didynamous.
2n

= 56.

Bacopa eisenii

Bacopa egensis
Phenology Flowering May–Oct. Flowering Aug–Oct.
Habitat Marshes, ponds, pools, wet soil, wet ditches, rice fields. Shallow, quiescent water, lakes.
Elevation 30–1100 m. (100–3600 ft.) 0–20 m. (0–100 ft.)
Distribution
from FNA
AZ; CA; NV
[BONAP county map]
from FNA
AR; LA; Central America (Costa Rica, Nicaragua); South America (Brazil) [Introduced in North America; introduced also in w, c Africa (Republic of Cameroon, Democratic Republic of Congo, Ghana, Nigeria, Senegal)]
[BONAP county map]
Discussion

Bacopa eisenii was reported by T. H. Kearney and R. H. Peebles (1960) based on a specimen labeled B. rotundifolia at ARIZ.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Bacopa egensis was first collected in the United States by Josiah Hale in the early 1800s (C. E. Depoe 1969). There are subsequent collections from Arkansas and Louisiana.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 262. FNA vol. 17, p. 262.
Parent taxa Plantaginaceae > Bacopa Plantaginaceae > Bacopa
Sibling taxa
B. caroliniana, B. egensis, B. innominata, B. monnieri, B. repens, B. rotundifolia
B. caroliniana, B. eisenii, B. innominata, B. monnieri, B. repens, B. rotundifolia
Synonyms Ranapalus eisenii Hydranthelium egense
Name authority (Kellogg) Pennell: Proc. Acad. Nat. Sci. Philadelphia 98: 96. (1946) (Poeppig) Pennell: Proc. Acad. Nat. Sci. Philadelphia 98: 96. (1946)
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).



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