J. Th. Henrard, A Critical Revision of the Genus Aristida. 11 Stuckert no. 10488 I have not seen. The description of the var. argentina does not agree with all the plants cited. The numbers 10458, 11013 and 17305 have a first glume longer than the second, they belong to a very different perennial species {Aristida leptochaeta HACK.). Only the number 11446 has a first glume shorter than the second, in accordance with the description. As to the question „ W h a t is the type", I am of the same opinion as Prof. HITCHCOCK. The description ought to control the selection of the type specimen, and the description prevails, hence the number 11446, the only one with a lower glume shorter than the upper, is taken as the type, t h a t is the specimen from which the description was drawn (See Journal of Botany June 1924). The type specimen is a perennial plant and belongs to Aristida subinterrupta ARECHAVALETA, it differs but slightly from that species in the shorter glumes and shorter awns, in other respects espe­ cially in vegetative characters it agrees perfectly with the Uruguayan species. Note: = Aristida (Hack.) Henr.. subinterrupta Arechavaleta var. argentina Aristida Adscensionis L. var. argentina Hack. subv. densiflora Hack. ар. T. STUCKERT; Tercera Contribución al conocimiento de las Gramináceas Argentinas, in Anales del Museo Nacional de Buenos Aires, Tomo XXI. [1911] p. 6 5 ! Differt a typo panícula densissima, habitus A. Adscensionis v. caerulescentis subv. condensatae Hackel. St. no. 20.532 (16. XII. 1909) Villa García, cercanías de Tanti, Dep. Sta. María, Córdoba. Stuckert's n u m b e r 20532, the only specimen mentioned, in HACKEE'S Herbarium (Hb. Vindob. no. 40528). This is the type and agrees with the type of Aristida Adscensionis var. argentina as selected by me, having a somewhat denser panicle. Note: = Henr,, Aristida subinternipta Arechav. var. argentina (Hack.)