Dandya purpusii (Brandegee) H.E. Moore, 1953

Gutierrez, Jorge & Terrazas, Teresa, 2020, Xochiquetzallia (Asparagaceae, Brodiaeoideae), a new genus segregated from the paraphyletic Dandya, PhytoKeys 139, pp. 39-49 : 39

Dandya purpusii (Brandegee) H.E. Moore

Dandya purpusii (Brandegee) H.E. Moore, Gent. Herb. 266-268 (1953).

Muilla purpusii Brandegee, Univ. Calif. Publ. Bot. iv, 177 (1911).

Bloomeria purpusii (Brandegee) Macbride, Contr. Gray Herb. Ser. 2. 56: 1-20 (1918).

Brodiaea purpusii (Brandegee) Ingram, Madroño xii, 27 (1953).

Description.

Perennial herbs, 28-47 cm tall, including corm and inflorescence. Fibrous roots. Corm subglobose compressed, fleshy, 1.0-1.7 cm in diameter; tunic formed by the wide bases of the leaves, brown or dark brown, covering up to 2.0 cm from the base of the scape. Leaves 2-3, 13-27 cm long, dark green, linear, subterete, with scabrous surface, hyaline prominences on the veins; base truncated, apex acute. Inflorescence in umbel; Scape of 27-42 cm long, usually longer than leaves, terete, surface smooth or with acute prominences. Floral bracts 2-3, linear-lanceolate, triangular, 4.0-8.5 mm long; bracteoles, one per flower. Flowers 6-11, pedicels 2.0-4.0 cm long, subcampanulate, erect, articulate, floral tube 1.5-3.0 mm long; tepals blue, 6 in 2 series, external tepals ovate-lanceolate, 6.0-10.0 × 1.5-3.0 mm, apex acute and papillose, base cuneate, entire margin; internal tepals ovate-lanceolate, 6.0-9.5 × 1.6-3.0 mm, apex obtuse and papillose, base cuneate, entire margin. Stamens 6; filaments free, adnate to the throat of the tube, widened toward the base, 4.0-6.0 mm; anthers oblongs, yellow, basifixed, 1.5-2.0 mm; gynophore 0.5-1.1 mm long, adnate to the floral perigone formed three cavities, present pith. Ovary cylindrical, 2.5-5.5 mm, fused at its base to the floral perigone; style filiform, 2.1-4.0 mm; stigma divided, papillose; capsule loculicidal, subcylindric, glabrous, brown, 10.0-12.0 mm long; seed oblong-falciform, compressed, black, bright, 3.0 × 5.0 mm.

Type species.

MEXICO. Coahuila; Sierra de la Paila, October 1910, Purpus 4959 (holotype UC!; isotypes F!, GH!).

Specimen examined.

MEXICO: Coahuila, Municipality of Ramos Arispe, Valle de los Ángeles, Sierra de la Paila, 6 August 1975, M. F. Robert & J. Passini 4675 (ENCB); El Cidral, Sierra de la Paila, 20 August 1987, J. A. Villarreal 3980 (TEX); 5.9 miles east of the road between Yucatan and Mexico, highway 40, west of the mountains along a gravel road to 17.2 miles north of Mexico highway 40, 1650 m elevation, 19 September 1996, J. M. Porter 11308 & J. T. Columbus (RSA); 15 km north of Estación Marte, on secondary road, 1550 m elevation, 24 October 2011, J. Gutiérrez et al. 1225 (FEZA, CHAPA, MEXU, UAMIZ).