1918] SCHN EIDER—SALIX 29 
attenuata, pedicellis dimidio ovarii sublongioribus suffulta, glabra, 
stigmatibus linearibus _ bifidis stylo subaequilongis coronata; 
glandula 1, ovato-rectangularis, obtusa, pedicello 2—3plo brevior; 
_ bracteae oblongae, obtusae, ut in floribus masculis pilosae, pedicel- 
lum subsuperantes; fructus e basi subacuta ovoideo-lanceolati, 
subrostrati, circ. 4 mm. longi, pedicello 1.5—2 mm. longo excluso. 
TYPE LOcALITY.—Mexico: State of Michoacan, prope Aganguio. 
RancE.—Central Mexico: States of Michoacan and Mexico. 
SPECIMENS EXAMINED.—Mexico: State of Michoacan, “prope Aganguio,” 
1840, Th. Hartweg (no. 390, m.; co-type in Herb. N.).—State of Mexico, 
ig slope of Volc. Toluca, September 9, 1893, E. W. Nelson (no. 26, f., fr.; 
This species seems most closely related to S. mexicana Seem., both possess- 
ing a dorsal gland in the male flowers. The late time of flowering cannot be 
regarded as a valuable taxonomic character because there are spring flowering 
forms of S, mexicana, and of S. lasiolepis I have seen forms of southern Cali- 
fornia flowering in the fall. The relationship of S. Hartwegii and the following 
Species to S. lasiolepis and other species of sect. CorpATAE needs further 
Investigation. 
13. S. MEXICANA vy. Seemen in Bot. Jahrb. 21, Beibl. 52:9. 1895. 
TYPE LOCALITY.—Mexico: State of Hidalgo, Zacualtipan’s (coll. Ber- 
landier, ex Seemen). 
RANGE.—Central Mexico: States of Hidalgo, Mexico, Pueblo. 
SPECIMENS EXAMINED.—Mexico: State of Hidalgo, Sierra de Pachuca, 
2Y brooks, alt. 2900 m., September 8, 1899, C. G. Pringle (no. 8237, f., m., St. 
to to r5 ft.”); same locality, alt. 2800 m., September 1, 1906, C. G. Pringle 
(no. 13783, m.,f.; G.,W.); Tulancingo, August 26, 1893, E. W. Nelson (m.; W.). 
—State of Puebla, Barranca below Honey Station, alt. 1680 m., September 9, 
1906, C. G. Pringle (no. 1 3817, st.; G.).—State of Mexico, Ixtaccihuatl, along 
brooks, March 1906, C. A. Purpus (no. 1801, f., st.; G., M., W.). 
: € specimens before me agree well with v. SEEMEN’S description, and the 
Sierra de Pachuca is not far from the type locality. SEEMEN himself states that 
his species is Closely related to S. Hartwegii (see above); especially by the 
Presence of a dorsal gland which, however, is not mentioned by SEEMEN. It 
may easily be distinguished from SS. Hartwegii by its glabrous branchlets and 
leaves, but the ovaries are glabrous in both the species, not hairy in S. H aed - 
Wegit, as SEEMEN states, The male specimen of Nelson shows a few remaining 
ma: i. nih cites also “St. Pietro et St. Paulo (Ehrenberg, U. hde <) “apere = 
nY localities of this name in Mexico, and not having seen the specimens I am not 
site about the exact place where they were found. 
