TILIACEAE. — TILIA 369 



Tilia tuan, var. chinensis Rehder & Wilson, n, comb. 



Tilia Miqxicliana, var. chinensis Szyszylowicz in Hooker's Icon. XX. sub t. 



1927 (1890). 

 Tilia chinensis Schneider, III. Handb. Laubholzk. II. 384, fig. 257 1-m (non 



Maximowicz) (1909). — V. Engler, Monog. Tilia, 130 (1909). 



Western Hupeh: Changyang Hsien, woods, alt. 1300-2000 m., 

 July and October 1907 (Nos. 486, 2331 ; tree 6-16 m. tall, girth 1-2 m.) ; 

 Ichang Fu, mountains north of Nanto, June and October 1900 (Veitch 

 Exped. No. 1242, tree 16 m. tall) ; Patung Hsien, woods, October 1900 

 (Veitch Exped. Seed No. 926); Hsing-shan Hsien, A. Henry (No. 6474 

 in Herb. Gray). 



This variety is as common in western Hupeh as the type from which it is dis- 

 tinguished by its gray tomentose shoots and its densely pubescent winter-buds. 

 The degree of pubescence on the under side of the leaves varies considerably. In 

 No. 2331, which is from a young tree, their under side is nearly glabrous; and in No. 

 486 it is covered with a rather loose gray felt. Henry's No. 6474 is intermediate 

 between these extremes. On young plants of this variety growing in the Arbore- 

 tum and also of the type the leaves are practically glabrous. In the flower and 

 fruit there are no differences between the type and the variety, and the dentation 

 of the leaves exhibits the same variability in both. 



Tilia sp. 



Kiangsi: Ruling, thickets, alt. 1300 m., July 28, 1907 (No. 1562; 

 bush or small tree 1-5 m. tall, common). 



It is quite possible that this is nothing but a state of the variable T. tuan 

 Szyszylowicz, but our material is limited to leafy shoots. The leaves are strongly 

 veined, sharply serrate and nearly glabrous. As a shrubby plant this Linden is 

 common round Ruling, but Wilson failed to discover any flowers. 



Here may be added notes on several species not collected during the Arnold 

 Arboretum expeditions. 



Tilia mongolica Maximowicz in Bull. Acad. Sci. St. Petersbourg, XXVI. 433 

 (1880); in Mel. Biol. X. 585 (1880); Enutn. PI. Mongol. 118 t. 11 (1889). — 

 Franchet in Nouv. Arch. Mus. Paris, ser. 2, V. 212 {PI. David. I. 60) (1883).— 

 Hemsley in Jour. Linn. Soc. XXIII. 94 (1886). — Palibin in Act. Hort. Petrop. 

 XIV. 112 (1895). — Rehder in Sargent, Trees & Shrubs, I. 121, t. 61 (1903).— 

 Schneider, III. Handb. Laubholzk. II. 369, fig. 249 g-h, 250 c-d (1909). — V. 

 Engler, Monog. Tilia, 85 (1909). 



Chili: Weichang, 1910, W. Purdom (Nos. 86, 864); "Calceenwong," 1910, 

 W. Purdom (No. 67); Hsao Wu-tai-shan, mountain slopes, alt. 1300-2300 m., 

 August 21, 1913, F. N. Meyer (No. 1258). 



Barbulae may be present or absent in this species. 



Tilia laetevirens Rehder & Wilson, n. sp. 



Arbor; ramuH glabri, satis graciles, hornotini flavescentes, annotini sordide 

 aurantiaci, vetustiores fusco-cinerei; gemmae ovoidcae, obtusae, glabrescente8, 

 fulvo-brunneae. Folia membranacea, late ovata v. orbiculari-ovata, interdum 

 leviter lobata, subito leviter acuminata, basi oblique truncata v. subcordata, rare 

 latissime cuneata, serrulata dentibus parvis fere ad mucronem reducta, v. dcntato- 



