ROSACEAE. — SPIRABA 451 
noticed by Batalin in the flowers of this variety is quite noticeable in the dried 
specimens, although in the living plant the flowers are probably white. This 
change of color seems to occur occasionally in other species, and also in Wilson’s 
No. 2765 of S. Henryi the flowers are decidedly yellowish. 
Spiraea Rosthornii Pritzel in Bot. Jahrb. XXIX. 383 (1900). 
Spiraea Prattii Schneider, Ill. Handb. Laubholzk. I. 472 (1905). 
Western Szech'uan: north-east of Tachien-lu, woods and thick- 
ets, alt. 3300 m., July 4 and October 1908 (No. 965°; shrub 1-2 m. 
high; west and near Wén-ch'uan Hsien, thickets, alt. 1700-2700 m., 
July 1908 (No. 965°); same locality, October 1910 (No. 4305); Mupin, 
thickets, alt. 2000-2500 m., June 1908 (No. 2758; bush, 1.75-2 m. 
high); Wa-shan, thickets, alt. 2000-2600 m., June and September 1908 
(No. 965; bush 1-2 m., flowers white) ; same locality, alt. 1700-2300 m., 
June 1908 (No. 2759; bush, 1-1.75 m. high); Niu-tou-shan, west of 
Kuan Hsien, alt. 2000-2700 m., June 20, 1908 (No. 2748); without pre- 
cise locality, alt. 3300-4000 m., July 1903 (Veitch Exped. No. 35559); 
Nanch'uan, A. von Rosthorn (No. 1837, type). 
"This species is very near S. longigemmis Zabel which differs chiefly in its gla- 
brous, less deeply and closer serrate leaves.  Pritzel describes the buds as spher- 
leal, “ gemmis sphaericis," but a fragment of the type specimen which I have 
before me and which agrees in every other particular with the description has 
winter-buds like those of S. longigemmis. Spiraea Rosthornii is possibly only a 
pubescent variety of S. longigemmis. To the latter I refer Wilson's Veitch Exped. 
No. 3555P from western Szech'uan. 
Spiraea japonica Linnaeus f., Suppl. 262 (1781). — Maximowicz in 
Act. Hort. Petrop. VI. 203 (1879). — Hemsley in Jour. Linn. Soc. 
XXIII. 225 (1887). — Zabel, Strauch. Spir. 64 (1893). — Schneider, 
Ill. Handb. Laubholzk. I. 475, fig. 294 m, 295 k-1 (1905). 
Spiraea callosa Thunberg, Fl. Jap. 209 (1784). — Seringe in De Candolle, 
Prodr. II. 544 (1825). 
The type does not seem to occur in China. 
Spiraea japonica, var. Fortunei Rehder in Bailey, Cycl. Am. Hort. 
IV. 1703 (1902). 
— AN Lindley & Paxton, Flow. Gard. II. 113, fig. 191 (non. Thunberg) 
Spiraea Fortunei Planchon in Fl. des Serr. IX. 35, t. 871 (1853). — Hooker 
f. in Bot. Mag. LXXXVI. t. 5164 (1860). 
Kiangsi: Kuling, roadsides, abundant, alt. 1300 m., July 30, 1907 
(No. 1717; bush 0.75-1 m., flowers pink). Western Hupeh: Fang 
