Cf.- Perhaps R. rivinum It is the plant of James' refund to irigium? in 18, 174 (in Herb. Dorr!), also from Aug. 5, '42. (in the South Woods) - and Stretch (Washoe Valley) Rivinum in Herb. Dorr, now in Herb. Dorr. So far as Zorn's spec. for it is R. Missourianum. Nuthall's own spec. has smaller leaves (6-8" diam.) - Nuthall's on like mine, a little more pubescent, - 20 Barry's, (Barnsley) Call it irigium = 300 Geyer, Oreg., 1773 Mr. Calf. 258, Flora 3/2 from '46 and 254 '44 + also a spec. of James in Herb. Dorr. seem to be the same K. Lancaster has the flowers & long slender peduncles, in oxyacanthus they are similar or in short racemes [illegible]