Pilostyles thurberi Gray, Pl. Nov. Thurb. 326-327. 1854.

Bellot, Sidonie & Renner, Susanne S., 2014, The systematics of the worldwide endoparasite family Apodanthaceae (Cucurbitales), with a key, a map, and color photos of most species, PhytoKeys 36, pp. 41-57 : 51

10. Pilostyles thurberi Gray, Pl. Nov. Thurb. 326-327. 1854.

Pilostyles covillei Rose, Contr. U.S. Natl. Herb. 12: 263. 1909. Type: USA, Texas, Dickens county, Matador ranch, 14 June 1894, parasitic on Parosela formosa (Torr.) Vail, F. V. Coville 1860 (US, not seen).

Pilostyles glomerata Rose, Contr. U.S. Natl. Herb. 12: 263. 1909. Type: Mexico, Puebla, near Tehuacán, 31 Aug. 1905, parasitic on Parosela , J. N. Rose and J. H. Painter 9942 (NY, G). The protologue gives the collection number as 8942.

Pilostyles palmeri Rose, Contr. U.S. Natl. Herb. 12: 263. 1909. Type: Mexico, San Luis Potosí, near Alvarez, May 1887, parasitic on Parosela , E. Palmer 584 (US-570088).

Pilostyles pringlei (Watson) Hemsl., J. Linn. Soc., Bot. 31: 311. 1896 = Apodanthes pringlei Watson ex B.L.Rob., Bot. Gaz. 16: 83, tab. 9. 1891, no Latin descr.; Pilostyles pringlei (Watson) Rose, Contr. U.S. Natl. Herb. 12: 264. 1909, superfluous transfer. Type: Mexico, Sierra Madre, near Monterey, 27 June 1888, parasitic on Dalea frutescens A. Gray, C. G. Pringle 1949 (NY, M, G).

Pilostyles sessilis Rose, Contr. U.S. Natl. Herb. 12: 263. 1909. Type: male flowers: Mexico, Hidalgo, Ixmiquilpan, 1905, parasitic on Parosela , J. N. Rose 9041 (NY); female flowers: Mexico, Querétaro, hacienda Ciervo, 20 Aug. 1905, parasitic on Parosela tuberculata (Lag.) Rose, J. N. Rose and J. H. Painter 9636 (NY, US).

Type.

USA, probably Arizona, near Gila river, June 1850, parasitic on Psorothamnus emoryi (A. Gray) Rydb., G. Thurber 682 (NY).

Note.

Tepals white, red to brown, in 3 whorls, each with 3 or 4 tepals, rarely more (Fig. 6B). Growing in branches of Dalea , Parosela and Psorothamnus in the southern United States of America and Mexico ( Figs 2 , 3 ). New York (NY) has a specimen from Mexico of this species annotated as " Pilostyles mortoni ", a nomen nudum, by Ida de Vattimo in 1952.

Figures

Figure 2. Geographic distribution of Apodanthaceae based on label information from 785 herbarium collections.

Figure 3. Phylogenetic relationships among the hosts of Apodanthaceae (legume relationships from Wojciechowski et al. 2006) and among the species of Apodanthaceae (from Bellot and Renner in review). Identical colors link parasite species and their host (s) and are also used in Figure 2. Dashed lines represent associations with rarely reported hosts; hosts in bold are the most common ones.