Flora of the Southeastern United States
2022 Edition

Colors

Data mode

Account

Login
Sign up

OROBANCHACEAE

Buchnera Linnaeus. Bluehearts.

Contributed by Bruce A. Sorrie

Key to Buchnera

A genus of about 100 species, hemiparasitic biennial and perennial herbs, of tropical and warm temperate regions of the Old and New Worlds. The taxonomy of this genus is poorly understood. The plants are root hemi-parasites, apparently not particular about the host species.

ID notes: Lower leaves are broadest, mid and upper leaves narrowest, often markedly so; the key refers to lower leaves. Leaf teeth are usually few in number and vary in development, from crenate to 2-3 mm long and sharply pointed. The former condition is normal for B. floridana, the latter for B. americana. Calyx length is ca. 0.5 mm longer in fruit than in flower. The foliage turns black on drying.

Ref: Pennell (1935); Philcox (1965); Sorrie (2019b) In Flora of North America Editorial Committee (2019). Show full citations.

Show in key(s)

Show parent

Show children

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map to see what it means. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.