Arthrostylidium youngianum is known from localities with an annual mean temperature of 20°C and precipitation of 2438 mm. Temperatures show relatively little seasonality (standard deviation ~36.8), varying from 25°C in the warmest month to 15°C in the coolest (isothermality ratio ~86.8). Precipitation shows moderate seasonality (coefficient of variation ~33), varying from 446 mm in the wettest month to 31 mm in the driest. The mean temperatures of the wettest (totaling 1285 mm) and driest (totaling 134 mm) quarters being 19.9°C and 20.1°C, respectively, and the mean precipitation of the warmest (26.4°C) and coolest (10.6°C) quarters being 644 mm and 619 mm, respectively.

Tables and figures are dynamically generated by intersecting georeferenced herbarium specimen localities with 10 minute resolution WorldClim v2.1 variables (Fick and Hijmans 2017). The above data are subject to change as specimens and geocoordinates are added, removed or altered.

Fick, S.E. and R.J. Hijmans, 2017. Worldclim 2: New 1-km spatial resolution climate surfaces for global land areas. International Journal of Climatology 37(12), 4302–4315. doi:10.1002/joc.5086

Specimens Referenced: . COLOMBIA Gentry, A. 60417 [1988-01-05], ---Amazonas: Alabaran D 21 [2004-03-23], Galindo A 11 [2004-03-22], ---Cauca: Alston, A. H. 8169 [1939-04-21], Pennell, F. W. 7350 [1922-06-28], Pennell, F. W. 7614 [1922-07-01], Sneidern, K. von 4303 [1943-00-00], ---Cundinamarca: Londoño, Ximena 438 [1989-03-15], ---Huila: Londoño, X. 862 [1994-01-07], Londoño, Ximena 862 [1994-01-07], ---Nariño: Benavides, Olga Salazar de 9037 [1987-12-13], Franco, P. 4715 [1993-12-01], Gentry, Alwyn H. 60417 [1988-01-05], Gentry, Alwyn H. 60417 [1988-06-05], Londoño, X. 238 [1987-03-09], Londoño, Ximena 238 [1987-03-09], Londoño, Ximena 493 [1990-09-13], ---Putumayo: Clark, L. G. 383 [1988-02-06], Londoño, X. 200 [1987-03-03], Londoño, Ximena 200 [1987-03-03], Londoño, Ximena 383 [1988-02-06], ---Valle del Cauca: Killip, E.P. 11393 [1922-09-11], Pennell, F. W. 5812 [1922-05-14]. ECUADOR ---Carchi: Young, Stephen M. [1980-05-15], Young, Stephen M. 137 [1980-05-15]