52. Drymaria tenuis S. Watson, Proc. Amer. Acad. Arts 25: 142. 1890.

≡ Drymaria tenuis var. genuina Briq., Annuaire Conserv. Jard. Bot. Genève 13–14: 374. 1911. nom. invalid.

= Drymaria filiformis Seaton, Proc. Amer. Acad. Arts 28: 117. 1893. Type: Mexico. Veracruz: Orizaba, 9000 ft [alt. 2743.2 m], 8 August 1891, H. E. Seaton 267 (holotype: GH [00037725 image!]; isotypes: F [266658 / F 0053292 F image!], K [K 000471788!], MO [3578890 / 144039 image!], NY [00581302 image!], US [1391052 / 00931428 image!, 10397/00103343 image!]) .

= Drymaria tenuis var. jaliscana Briq., Annuaire Conserv. Jard. Bot. Genève 13–14: 374. 1911. Type: Mexico. Jalisco: near Guadalajara, September 1893, C. G. Pringle 4536 (holotype: G [G 00640059 image!]; isotypes: COLO [422760/00363044 image!], E [E 00394861 image!], F [264418 / F 0053305 F image!], GH [00037744 image!], KFTA [KFTA 0000330 image!], LECB [LECB 0000547 image!], MEL [MEL 2499838 image!], MICH [1115005 image!], MO [3578893 / 356353 image!], NY [00342509 image!], PUL [PUL 00000233 image!], UC [UC 120343 image!], US [75112/00103367 image!], VT [UVMVT 024427 image!]) .

Type.

Mexico. Jalisco: under ledges of the barranca, near Guadalajara, 28 November 1888, C. G. Pringle 2120 (holotype: GH [00037743 image!]; isotype: VT [UVMVT 024426 image!]).

Distribution.

Mexico.

Notes.

Duke (1961) mentioned that the holotype of Drymaria tenuis is deposited in the US. However, this statement is an error. We have been unable to find a specimen of Pringle 2120 in the US, and the holotype is in fact the sheet at GH, where Sereno Watson worked at the time the species was described.