Flora of North America species comparison

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Bacopa innominata

Bacopa egensis

tropical water-hyssop

Brazilian water-hyssop
Habit Perennials. Perennials.
Stems

prostrate, 8–14 cm, hairy.

prostrate, 15–30 cm, hairy.
Leaves

hairy;

blade base ± truncate, margins entire, apex rounded.

glabrous;

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

6–10 mm.

10–12 mm.
Flowers

sepals 5, ovate to oblong, calyx bilaterally symmetric;

corolla white with white throat, 2–5 mm;

stamens 2–4, equal.

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

corolla white with yellow throat, 3–5 mm;

stamens 3 or 4, didynamous.

Bacopa innominata

Bacopa egensis
Phenology Flowering Jun–Sep. Flowering Aug–Oct.
Habitat Marshy areas, alluvial deposits along streams, wet ditches, muddy shores and banks. Shallow, quiescent water, lakes.
Elevation 0–200 m. (0–700 ft.) 0–20 m. (0–100 ft.)
Distribution
from FNA
FL; GA; MD; NC; SC; VA
[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 innominata differs from B. rotundifolia in having corollas entirely white; B. rotundifolia has corollas with yellow throats.

(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. 263. FNA vol. 17, p. 262.
Parent taxa Plantaginaceae > Bacopa Plantaginaceae > Bacopa
Sibling taxa
B. caroliniana, B. egensis, B. eisenii, B. monnieri, B. repens, B. rotundifolia
B. caroliniana, B. eisenii, B. innominata, B. monnieri, B. repens, B. rotundifolia
Synonyms Conobea innominata, B. cyclophylla, B. stragula, Herpestis rotundifolia Hydranthelium egense
Name authority (M. Gómez) Alain: Revista Soc. Cub. Bot. 13: 61. (1957) (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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