Macranthera

Herbs, perennial or biennial; hemiparasitic. Stems erect, not fleshy, retrorsely puberulent. Leaves basal and cauline, opposite; petiole present; blade not fleshy, not leathery, margins pinnatifid on proximal leaves, toothed on distal leaves. Inflorescences terminal, racemes; bracts present. Pedicels present; bracteoles absent. Flowers: sepals 5, calyx radially symmetric, campanulate to short-tubular, lobes linear; petals 5, corolla bright orange, bilabiate, tubular, abaxial lobes 3, adaxial 2; stamens 4, equal, filaments pilosulous; staminode 0; ovary 2-locular, placentation axile; stigma linear-clavate. Capsules: dehiscence loculicidal. Seeds ca. 110, brown to blackish, irregularly triangular, wings present (with tuberculate crest). x = 13.

Distribution

se United States.

Discussion

Species 1.

Selected References

Alford, J. D. and L. C. Anderson. 2002. Taxonomy and morphology of Macranthera flammea (Orobanchaceae). Sida 20: 189–204.

Musselman, L. J. 1972. Root parasitism of Macranthera flammea and Tomanthera auriculata. J. Elisha Mitchell Sci. Soc. 88: 58–60.

Lower Taxa

Macranthera flammea