60 JOURNAL OF THE ARNOLD ARBORETUM [vol. t 



supra costa minute puberula excepta glabra, subtus praecipue ad costam, 

 ncTvoS ct venulos dense breviter pilosa, in costa pilis sericeis interspersis, 

 in axillis barbulata; pctloli 3-4 mm. longa, dense breviter pubescentes. 

 Inflorescentia fructifera satis densa, pedunculo 1.5-2 cm. longo incluso 

 8-9 cm. longa; bracteae semiovatae, circitcr 2 cm. longae et 8 mm. latae, 

 margine convexiore dentatae dentibus paucis latis brevibus interdum fere 

 obsoletis, latere recto intcgrae vel subintegrac, basi Icviter inflexac et basin 

 nuculae amplectentes, busi circitcr 5-costatae costis et ncrvis cxtus adpresse 

 pubcsccntibus intus fcrc glabris; nuculae late ovoideae, comprcssae, 8-9- 

 costatac, perigonio coronatae, minute pilosulae, apicc longius i)ilosae, 

 resinosae. 



CliiXA. Hunan: inter urbcs Linling (Yungchoufii) et Sinning in silvis collium 

 snpra vicum Tjentiesse, alt. 400 m., Aug. 14, 1017, //. von Ilandd-Mazctti (No. 

 421, type); in silva infra TungHjiaj^ai ])r{)pe minas Hslkwangsclian, dist. Hsinhwa, 

 alt. ;350 in., May 20, 1918, //. von U andel-M azeltl (No. 534, ** arbor excelsa*'). 



This is a well-marked species of the section Eucar])inus, characterized 

 chiefly by the rather large, short-petioled, closely veined, nearly simply 

 serrate leaves with small mucronate teeth, by the dense villose pubescence 

 of the young branchlets and leaves, by the short-pilose i)ubescence of the 

 mider side of the mature leaves, silky or wanting in most other species, 

 by the shallowly dentate, not lolx^d bracts and the minutely pilose resin- 

 dotted nutlets. Carpinus Ilandclii is apparently most closely related to 

 C. Tschonoskil Maxim, and C. pohjncura Franch.; the first differs chiefly 

 in its longer petioles 0.5-1.5 cm. long, in the doubly serrate leaves glabrous 

 beneath except a silky ]>ul>escence on the veins, and in the glabrous nutlets; 

 the second s])ccies in ils smaller, slender-petit)lcd leaves with larger and 

 fewer simi)le teeth, in the smaller fruiting catkins and in the absence of 

 rcsin-duts on the nutlets. In the size, shape and serration (^f the leaves the 

 new species resembles the Himalayan C.faginca Lindlcy, but tliat species 

 has the leaves glabrous beneath, at least at maturity except tlie silky- 

 pubcsccnt midrib and secondary veins, and has smaller more shar])ly ser- 

 rate-dentate bracts and apparently^ no resin-dots on the nutlets (only im- 

 mature fruit seen). 



Betula pendula Roth f. viscosa, comb. nov. — Betula dcntata viscosa 

 pynnnidalis L. Chenault & Fits, Cat. 1912/13, 3.— Betula verrucosa var- 

 dcntata rfs-rnsa l?ean, Trees & Shrubs, i. 2G4 (1914). 



A slow-growing bushy tree of dense pyramidal habit; young branchlets 

 densely glutiuous-verrucose: leaves triangular-ovate, 3-6 cu\. long, acumin- 

 ate, t.'uncate or occasionally subcordate at the base incisely and doubly 

 dentate and lobulate, glabrous with glandular dots benc^ath; petioles 0.4-1 

 cm. long. In the shni)e of its leaves it reseml)les somewhat B. alba var. 

 urticacfolia Spach, but it is perfectly glabrous and the branchlets are very 

 resinous. In habit it has some resemblance to B, pcndnla L fadigiata K. 

 Koch, but the leaves arc more deei)ly and coarsely toothed, the petioles are 

 sliorter and the branchlets more densely resinous. 



(To be continued) 



