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spite of distinct indications of glands upon the perianths here 
and there, I think this is rightly named. Its fruits are black and 
beautifully polished and shining : in Hyclropiper they are browner, 
very slightly granular and not so highly polished or shining. I 
cannot understand “Camb. Brit. FI.” describing the leaves of 
P. mite as “subtruncate at the base” — this is not so in the 
examples in my herbarium, which have the base tapering into the 
petiole as in Mr. Hall’s examples. — C. E. Salmon. 
Rimex crispus x obtusifolius. Swampy ground, Hitchin, Herts., 
v.c. 20, July 18, 1920. Mr. A. J. Wilmott assents to the naming 
for a plant which he saw. The assumed parents were growing in 
quantity intermingled with the hybrid. The teeth upon the 
fruiting segments vary considerably in length. — J. E. Little. 
Alnus rotundifolia Mill, var. microcarpa Rouy. Bank of rhine, 
Nailsea Moor, N. Somerset, v.c. 6, Mar. 30 & Sept. 24, 1920. — 
Ida M. Roper. Correct, I believe ; it agrees with the description 
in the “ Camb. Brit. Flora,” and with other specimens so named 
in Herb. Mus. Brit., but the size of the fruits varies considerably 
even on the same inflorescence. The use of the name rotundifolia 
is invalid on account of the existence of an earlier trivial name 
Betula glutinosa L. “Syst. Veg.” ed. 10, 1265 (1789). See 
“Camb. Brit. Flora,” ii. 87 (1914). — A.B.J. 
Salix triandra L. subsp. Hoffmanniana (Sm.). Alder swamp, 
nr. Blackhorse Lane, Hitchin, Herts., v.c. 20, April 10, 1920. — 
J. E. Little. Under type, I should say. Mr. Little’s description 
of the mature leaves as “lanceolate, narrowed below” seems to 
exclude the subsp. — VV. FI. Pearsall. No adult leaves! One, 
even if withered, would have been decisive. There are no signs 
of the young leaves being at all ovate-lanceolate. I think it is 
S. triandra rather than S. Hoffmanniana. — E. F. Linton. 
Salix Smithiana Willd. ( = S. caprea x viminalis). Between 
Lickfold and Bexley Hill, W. Sussex, v.c. 13, Aug. 30, 1918. 
Named by Mr. A. B. Jackson.— VV. C. Barton. Yes; S. caprea- 
viminalis Wimmer.— W. H. Pearsall. 
S. aurita x cinerea (S. lutescens A. Kern). Crox Bottom, 
Bishopsworth, N. Somerset, v.c. 6, March 18, Sept. 16, 1920.— 
Ida M. Roper. So I should name this willow. A fairly inter- 
mediate sample.— E. F. Linton. Yes; ample indications of the 
less evident parent aurita. — W. H. Pearsall. 
Pop ulus alba L. ? Pistillate catkins, March 21, 1920. Leaves, 
October 7, 1920. Tree planted at Pembroke Road, Cliftorq 
