BETULACEAE. — ALNUS 495 



as between Yokohama and Tokyo. It reaches its maximum devolopment in open 

 Bwampy country in northern Hokkaido, where it forms pure and extensive woods. It 

 grows from 25 to 33 m. tall and has a straight trunk from 2 to 3 m. in girth and clear 

 of branches for half the height of the tree. The bark is gray and rough, the branches 

 are slender and rather short and s]jreading and form a narrow symmetrical crown. 

 This is the tallest of the Japanese Alders and a very handsome tree. Matsumura 

 reports this species from Kyushu, and it may be cultivated there, but 1 did not see 

 it and doubt if it is indigenous so far south. Pictures of this tree will be found 

 under Nos. x440, x441, x445 of the collection of my Japanese photographs. 



E. H. W. 



4. Alnus paniculata Nakai in Tokyo Bot. Mag. XXIX. 45 (1915). 

 NORTHEASTERN ASIA. Northern Korea: on the mountains Hoang- 



gui-to (ex Nakai). 



I do not know this species, which according to Nakai is " forsan finitima ad Al. 

 maritimmn quae non vidi et Al. japonicac proxima venit, sed a prima inflorescentia 

 foeminea paniculato-decomposita, a secunda inflorescentiae forma et foliis ovatis v. 

 obovatis v. rotundatis bene distinguenda." To judge from the rather insufficient de- 

 scription this species may be a variety of A. japonica Siebold & Zuccarini with 

 more numerous female catkins. 



5. Alnus Henryi Schneider, n. sp. 



Alnus maritima, var. formosana Burkill in Jour. Linn. Soc. 500, quoad speci- 

 men Henryi (No. 1389) (1899). 



Arbor ?; ramuli homotini tantum apice sparse pilosi, subangulati, olivacei, deinde 

 flavo-brunnei v. nigrescentes, lenticellati; gemmae nondum visae. Folia late ovata 

 V. ovato-elliptica, basi rotunda v. rarius subacuta, apice obtusa, sed subito in 

 acumen brevissimum producta, margine breviter subdistanter serrulata, basin 

 versus Integra, textura chartacea, supra ut videtur intense viridia, glabra v. nervis 

 costaque sparse pilosa, subtus viridia (an subnitentia?), glabra v. sparse puberula 

 et axilUs nervorum lateralium utrinque (6-) 7-9 elevatorum paulo barbulata, 4-8 

 cm. longa et 2.5-5.2 cm. lata; petioli tantimi sulco superne pilosula, 1-1.6 cm. longa. 

 Amenta masculina femineaque tantum valde juvenilia et incompleta visa; fructi- 

 fera in ramulis lateralibus racemoso-paniculata, racemis lateralibus strobilos 4 

 gerentibus pedunculo circiter 1 cm. longo suffultis, inflorescentia tota 11 cm. longa, 

 etrobilos circiter 13 gerens. Strobili elliptici, laterales sessiles v. subsessiles, 

 1.3-1.5 cm. longi, 1-1.3 cm. crassi; bracteae apice truncato-obtusae, indistincte 

 lobulatae, extus levissime excavatae, circiter 4 mm. longae et latae; semina elUp- 

 tica, utrinque obtusa, crasse marginata. 



CHINA. Formosa : Tamsui, September 26, A. Henry (No. 1389, type, in Herb. 

 New York Bot. Gard.). 



This species looks very different from A. formosana Makino or A. maritima 

 Muhlenberg or A. japonica Siebold & Zuccarini. The leaves of the only specimen 1 

 have seen are rather short and broad, and the fruiting catkins are much more numer- 

 ous than in the above species. The cones and bracts are different too. It flowers 

 a])i)arently in the spring like A. japonica Siebold & Zuccarini, and not at the end 

 of the summer or in the fall like the two other species. 



5. Alnus Fauriei L6veille in Bull. Soc. Bot. France, LI. 423 (1904). 

 Alnus glutinosa, var. cylindrostachya Winkler in Engler, Pflanzenr. IV.-61, 



118 (1904). 

 Alnus Schneideri Callier in Fedde, Rep. Spec. Nov. X. 229 (1911); apud 



Schneider, III. Hajidb. Laubholzk. II. 890, fig. 556 k-m, 557 c (1912). 

 Alnus cylindrostachya Makino in Tokyo Bot. Mag. XXVI. 390 (1912). 



