12 "WILSON EXPEDITION TO CHINA 



Pinus Armandi Franchet is remarkable for the variation in tlie position of the 

 resin-ducts of the leaves. The duct in the ventral angle of the leaf is medial but 

 the dorsal ducts may be external only, medial only or both external and medial, and 

 this variation may be seen in leaves growing on the same branchlet. Masters's 

 P. scipioniformis is founded on an immature cone of P. ArmaTidi and a leaf with 

 external ducts. Therefore he classifies it with the section Strobus. Patschke, on 

 the other hand {Bot. Jahrb. XLVIII. 66i), finds that the dorsal ducts are medial 

 and therefore classifies it with the section Cerabra. This system of classification 

 breaks down with this species for no account is taken of dorsal ducts in both 

 positions in the same leaf and this character is frequent, in the Wilson collec- 

 tion, among the leaves that I have examined. Masters*3 P. mandschurica and 

 Patschke's P. excelsa, both from the same locaUty in Yunnan, are certainly this 

 species. P. Armandi and P. koraiensis need not be confused. The cone of P. 

 koraiensis shrinks, and exposes its seeds to view, but is inert under hygrometric 

 changes, while the cone of P. Armandi opens at maturity and closes when immersed 

 in water. The seed of P. koraiensis is unique among Pines, the nut being entirely 

 covered, except the black umbilical scar, with a brown membranous spermoderm, 

 while the spermoderm of P. Armandi is reduced to a marginal border produced 

 into a rudimentary wing, exactly as in P. flexilis James. The branchlet of P. ko^ 

 raiensis is tomentose, that of P. Armandi glabrous. 



In accordance with these considerations the Chinese specimens are rearranged 

 below. The four species collected by Mr. Wilson represent, so far as I can de- 

 termine, all the Pines that have been found within the limits of the eighteen 

 provinces of China proper. 



Pinus Armandi Franchet in Nouv. Arch. Mus. Paris, s^r. 2, VII. 

 95,t. 12 {PL David.l, 2S5) (1884); in /owr. de Bof. XIII. 254 (1899).— 



Masters in Jour. Unn. Soc, XXVI. 549 (1902); XXXVII. 415 

 (1906)- — Beissner in Nuov. Giorn, BoL Ital n. ser, IV. 184 (1897). 

 Clinton-Baker, III. Conif. I. t. 6 (1909). — Stapf in Bot. Mag. 

 CXXXVI. t, 8347 (1910). — Mottet in Rev. Hort. 1910, 423, f. 177- 

 180. — Patschke in BoL Jahrb. XLVIII. 657 (1912). 



Pinus koraiensis Beissner in Nuov. Giorn. Bot. Ital. n. ser., TV. 184 (non Sie- 

 bold & Zuccarini) (1897). — Masters in Jour. Linn. Soc. XXVI. 550 (1902) ; 

 XXXVII. 415 (1906); in Gard. Chron. ser. 3, XXXIII. 34, f. 18, 19 

 (1903).— Patschke in Bot. Jahrb. XLVIII. 657 (1912). 



Pinus scipioniformis Masters in Bull. Herb. Bmssier^ VI. 270 (1898) ; in Jour. 

 Linn. Soc, XXVL 552 (1902); XXXVII. 415 (1906). — Patschke in Bot. 

 Jahrb, XLVIII. 657 (1912). 



Pinus mandschurica Masters in Jour. Linn. Soc. XXVI. 551 (non Ruprecht) 

 (1902); XXXVII. 416 (1906). 



Pinus Mastersiana Hayata in Gard. Chron. ser. 3, XLIII. 194 (1908). 



Pinus Armandi, var. Mastersiana Hayata in Jour. Coll. Sci. Tokyo, XXV. 



art. XIX. 215, f. 8 {Fl. Mont. Formosae) (1908). 

 Pinus levis Lemde & Leveille in Fedde, Rep. Sp. Nov. VIII. 60 (1910). 

 PiniLS excelsa, var. chinensis Patschke in Bot. Jahrb. XLVIII. 657 (1912). 



around 



abundant 



tree 15-20 m. tall, girth 0.6-1.5 m., bark smooth, pale gray); same 



