Oxypolis rigidior (L.) C. & R.

Oxypolis rigidor plant

Family - Apiaceae

Stems - No info. yet.

Oxypolis rigidor stem

Leaves - No info. yet.

Oxypolis rigidor leafLower leaf.

Oxypolis rigidor leavesUpper leaves.

Inflorescence - No info. yet.

Oxypolis rigidor umbelBase of the umbel.

Oxypolis rigidor umbelBase of the umbellet.

Flowers - No info. yet.

Oxypolis rigidor flowersFlowers close-up (with morning dew).

Flowering - July - September.

Habitat - Wet soils along streams, fens, wet prairies, moist bluffs, swamps.

Origin - Native to U.S.

Other info. - This species can be found mainly in the Ozark region of Missouri but is found in a few northern counties also. The plant can be identified in the field by its glabrous and glaucous stems, compound umbels and its mostly entire leaflets. If the leaflets have teeth, then the teeth are few, coarse, and in the apical 1/2 of the leaf. Another species, Sium suave Walt., is similar but has larger leaflets with many-toothed margins. This latter species is found scattered throughout the state and grows in much the same habitats.

Photographs taken at Shut-Ins Mountain Fen, Shannon County, MO., 8-10-03.


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