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FNA | Family List | FNA Vol. 12 | Comandraceae

1. Comandra umbellata (Linnaeus) Nuttall, Gen. N. Amer. Pl. 1: 157. 1818.

Thesium umbellatum Linnaeus, Sp. Pl. 1: 208. 1753

Leaf blades light green to grayish or bluish green, lanceolate, elliptic, or ovate, 0.7–5.3 cm, apex obtuse, acute, or acuminate. Flowers: hypanthium base not dilated.

Subspecies 4 (3 in the flora): North America, n Mexico, s Europe (Balkan peninsula).

Comandra umbellata is likely the most widespread Santalales species, occurring throughout the United States, southern Canada, and northern Mexico as well as in the Balkan peninsula, where subsp. elegans (Rochel ex Reichenbach) Piehl occurs. Comandra umbellata is the alternate host for comandra blister rust (Cronartium comandrae), which damages pines in North America.

1 Leaf blades thin, green, not glaucous; pseudodrupes 4–6 mm; rhizome cortex white to beige; Canada, c, e United States.   1a Comandra umbellata subsp. umbellata
+ Leaves thin or thick, becoming ± succulent, green to grayish or bluish green, glaucous; pseudodrupes 5–9 mm; rhizome cortex blue, drying blackish; w North America   (2)
2 (1) Leaf blade lateral veins obscure on abaxial surface; proximal part of aerial stems not overwintering; herbs 5–33 cm.   1b Comandra umbellata subsp. pallida
+ Leaf blade lateral veins apparent on abaxial surface; proximal part of aerial stems overwintering; subshrubs 15–40 cm.   1c Comandra umbellata subsp. californica

Lower Taxa


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