National Institute of Informatics - Digital Silk Road Project
Digital Archive of Toyo Bunko Rare Books

*Geogr. area* of *P. soongorica*: From Eastern Russia through Inner Asia until Trans-
baicalia, Tibet, Alpine Himalaya and Afghanistan.

**Potentilla sericea** L., Sp. pl. ed. 1 (1753) 495; Hemsley and Pearson, in Peterm.
Mitteil. Ergänzungsbd. 28 (1900) 374; Th. Wolf, Monogr. Gatt. Potent. (1908) 161;
Hemsley, in Journ. Linn. Soc. 35 (1902) 175 (var. *polyschista* Lehm.); Keissler, in
Ann. Naturh. Hofmuseum (1907) 25 (var. *polyschista* Lehm.); Stewart, in Bull. Torrey
Bot. Club (1916) 635; Fedtschenko, in Acta Horti Petrop. XXI (1903) 324; XXIV
(1905) 329; XXVIII (1907) 109, (1909) 481; *P. polyschista* Boiss.; Fedtschenko,
l. c. XXI (1903) 325.
N. E. *Tibet*, Camp I, the valley of Kara-muran, Kwen-lun, 4075 m., 7th Aug.
1896. According to HEMSLEY and PEARSON (l. c.) the identification is not sure
owing to insufficient material.
*Geogr. area*: From Ural eastwards to Transbaicalia; Afghanistan, Pamir, Tibet,
Himalaya.

**Potentilla hololeuca** Boiss., in Kotschy, Pl. Pers. bor. no. 345 (1843); Fl. Or. II
(1872) 710; Lehmann, Rev. Potent. (1856) 69, tab. 27; Th. Wolf, Monogr. Gatt.
Potent. (1908) 176.
var. **tibetica** Ostf. nov. var. (Pl. VI, Figs. 1—2). Differt a typo: statura multo
minor (caules 4—6 cm. longi), folia radicalia 2-juga, tomentum in pagina inferiore et
e pilis longis crispatis et e pilis sericeis micantibus compositum.
Northern *Tibet*, Ara-tagh, 4373 m., 24th July 1900 (flowering, Fig. 2); S. W.
Tibet, Height above the source of Tsangpo, northern foot of Himalaya, 5051 m.,
13th July 1907 (flowering, Fig. 1).
Dr. Th. WOLF has only seen the specimens from Ara-tagh. He agrees with
me that they look very like *P. hololeuca*, especially the var. *minor* Th. Wolf, l. c.
177, but owing to differences in the clothing of the leaves he suggests that they
are a hybrid between *P. hololeuca* and *P. Saundersiana* Royle. His notes are as follows:
»Im Blattschnitt und Habitus sind diese Pflänzchen der *Pot. hololeuca* Boiss.
var. *minor* Th. Wolf (Monogr. Gatt. Pot. 177), welche in Centralasien nicht selten ist,
sehr ähnlich, aber in der Behaarung verschieden (*P. hololeuca* besitzt ein dickes
,tomentum *floccosum*', welches nicht von Seidenhaaren bedeckt ist!). — Ich halte
vorliegende Pflänzchen für den Bastard *Potentilla hololeuca* Boiss. v. *minor* × *P.
Saundersiana* Royle.
»*P. hololeuca* × *nivea* wäre nicht ausgeschlossen, aber *P. hololeuca* × *Saundersiana*
scheint mir wahrscheinlicher (*nivea* und *Saundersiana* stehen sich übrigens sehr nahe!).
Ähnliche Zwischenformen sah ich aus Zaidam (Asia centr.), gesammelt von Roborowsky,
und aus Tibet, gesammelt von Ladygin in 4100 m. Höhe.«
I do not think that there is sufficient evidence to believe in a hybrid origin of
these specimens, and I felt my doubt strengthened when I got the same little plant