174 WILSON EXPEDITION TO CHINA 



NORTHEASTERN ASIA. Transbaikalia (see Herder, 1. c, and Wolf, 1. c). 



I have seen specimens of this species only from the Altai, collected by Sapo- 

 schnikof, June 10, 1897. It is very closely related to S. minutijlora Turczaninow 

 (see the keys, p. 79 and p. 93). 



SPECIES SECTIONIS INCERTAE. 



177. Salix allochroa Schneider. See p. 72. 



178. Salix polia Schneider, n. sp. 



Frutex erectus, ut videtm- satis longe ramosus; ramuli novelli annotinique dense 

 albo-griseo-tomentelli, deinde glabrescentes, fiavi, vetustiores brunneo-cineras- 

 centes; gemmae ovato-acutae, subappressae, tomentellae, rubro-brunneae. Foha 

 juveniUa lanceolata v. oblanceolata, apice breviter acuta v. subobtusa, basin versus 

 sensim attenuata, in petiolum 1-4 mm. longum villosum producta, supra dense 

 sericeo-villosa, paulo v. vix viridescentia, subtus densius albo-sericeo-villosa, nervis 

 nondum visibilibus, margine dense villosula, ut videtur interdum minute glandu- 

 loso-denticulata (glandulis inter pubescentiam occultis), 2-4 cm. longa, 0.4r-0.8 

 cm. lata; stipulae petioUs breviores, ovato- v. angusto-lanceolatae, tomentellae. 

 Amenta (9 tantum visa) subcoetanea, subsessilia, basi foliis parvis lanceolatia 

 2-3 suffulta, erecta, densa, cylindrica, 3-4 cm. longa, 1 cm. crassa, rhachi villoso 

 tomentella; ovaria sessilia, juveniUa crasse ovata, dein crasse ovato-oblonga, dense 

 sericeo-villosa, stylo mediocri satis tenui integro stigmatibus linearibus satis 

 longis apice bifidis subaequilongo coronata; bracteae late obovatae; ovaria juve- 

 nilia plus minusve amplectentes, dein ovariis triplo breviores, flavo-brunneae, 

 concolores, utrinque sericeae v. sericeo-villosae et ciliatae; glandula una ven trails 

 plana, oblongo-rectangularis, apice truncata v. emarginata, bracteis circiter 2-3-plo 

 brevior. Capsulae griseo-sericeo-villosae, circiter 6 mm. longae, sessiles (v. sub- 

 sessiles). 



MONGOLIA: near Saisansk, along a watercourse in sandy soil, May 21, 1911, 

 F. N. Meyer (No. 733, type; 9 ). 



This species resembles S. Lapponum Linnaeus (Spec. 1019 [1753]) and especially 

 S. Krylovii Wolf (in Act. Hort. Petrop. XXVIII. 537 [1911].— >S. pseudolapponum 

 Wolf apud Krylov, 0a. AAinan, 1226 [non Seemen] [1909)], to which I refer No. 836 

 of F. N. Meyer, Altai, Birel, June 16, 1911, and No. 793, Marka Kul, June 7, 1911. 

 In S. Lapponum Linnaeus, however, and in S. Krylovii Wolf, the ovaries 9,re dis- 

 tinctly stalked, while they are sessile in our new species. S. Lapponum Linnaeus 

 differs also in the more or less acute bracts, and the mostly longer style as well as 

 in the glabrous brown branchlets. S. Krylovii WoK has the same brown, somewhat 

 shining branchlets of the second year as S. Lapponum Linnaeus and broader, ellip- 

 tical or oblong-obovate leaves, while in S. polia the leaves are lanceolate or oblan- 

 ceolate and the branchlets are distinctly yellowish. As long as I do not know the 

 cT flowers I am not sure to which section S. Krylovii Wolf belongs. S. Lappo- 

 num Linnaeus is placed by von Seemen (in Ascherson & Graebner, Syn. Mitteleur. 

 Flora, IV. 182 [1908]) in sect. Viminales, but I think it would be better to keep 

 this species in a distinct section. Andersson (in De CandoUe, Prodr. XVI. 275 

 [1868]) placed S. Lapponum Linnaeus under sect. Niveae subsect. Villosae An- 

 dersson, the first species of which is S. spedosa Hooker & Amott. There is no 

 S. villosa under the different forms united by Andersson in his subsection, which 

 to my opinion does not form a natural group. 



The specific name is derived from irokioi, white of hair. 



179. Salix algista Schneider, n. sp. v. hybr. 



Frutex v. arbuscula, 0.9-4.5 m. alta, ut videtur satis breviter ramosa; ramuli 

 novelli sparse sericei, biennes glabri, purpureo-rubri, vetustiores cinerascentes. 



