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Rhodosciadium purpureum (Rose) Mathias & Constance

Comprehensive Description

provided by North American Flora
Rhodosciadium purpureum (Rose) Math. & Const Bull. Torrey Club 68: 124. 1941.
Deanea Pringlei Rose, Contr. U. S. Nat. Herb. 10: 128. 1906. Not Rhodosciadium Pringlei S. Wats.
1890. Deanea purpurea Rose, Contr. U. S. Nat. Herb. 10: 128. 1906.
Stout, from a short swollen tuberous rootstock, 4-12 dm. high, hispidulous throughout; leaves ovate to deltoid in general outline, excluding the petioles 10-25 cm. long, 8-17 cm. broad, ternate-pinnate, the leaflets ovate-lanceolate, acute to obtuse at the apex, cuneate at the base, more or less confluent, sessile, 2.5-5 cm. long, 1-2 cm. broad, crenate-serrate, hispidulous especially on the veins, margins, and rachis; petioles stout, 5-25 cm. long, hispidulous; uppermost cauline leaves linear, acuminate; inflorescence 2-trifurcate or irregularly branched, the peduncles slender, 3-17 cm. long, hispidulous; involucre wanting, or of a single minute, linear or filiform bract; involucel of several linear bractlets 3-5 mm. long, puberulent or hispidulous, exceeding the flowers but shorter than the fruit; rays 5-9, spreading-ascending, unequal, 1-5.5 cm. long; pedicels 2-6, spreading-ascending, 2-3 mm. long; petals purple; fruit oblong-ovoid, rounded at the apex, cordate at the base, 6-9 mm. long, 4-6 mm. broad, the dorsal ribs prominent, the lateral wings narrower than or equaling the body; seed-face involute.
Type locality: "Between Somoriel and Las Lajas, Hidalgo," Rose &■ Painter 9212. Distribution: Hidalgo to Tlaxcala (Pringle S601, S794).
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bibliographic citation
Albert Charles Smith, Mildred Esther Mathias, Lincoln Constance, Harold William Rickett. 1944-1945. UMBELLALES and CORNALES. North American flora. vol 28B. New York Botanical Garden, New York, NY
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