1919] 



\MERIC 



95 



'parvijoUa, from Mendocino County, Melbourne to Comptche, June- July 

 1903, W, L. Jepson (No. 2229, st.; Jeps.) seems to be a small-leaved form 

 of S. Coulteri judging by the pubescence of its branchlets and leaves which 

 measure up to 3.8:0,9 cm. Therefore I propose for it the name S. Coulteri 

 f. parvifolia, nov. comb, 



c. SECTION BREV^'ERIAXAE 



As I shall presently explain, S. Breiceri Bebb rei^resents such an unique 

 type among American Willows that it seems best to refer it to a separate 

 section in which I also place S, delnortensis described below which appar- 

 ently is most closely related to S. Brcwori Therefore, I propose sect. 

 Brewerianae, sect. nov. — Frutices ut videtur satis parvi ramis divaricatis 

 probabiliter basi tenacibus tenuioribus subangulatis. Folia matura crasse 

 chartacea, lanceolata vel obovata, subtus densissime albescenti-tomentosa, 

 distincte elevato-reticulata. Amenta praecocia vel coetanea, scssilia vel 

 subsessilia, anguste cylindrica, densiflora, saepe flexuosa; flores masculi 

 diandri, filamentis liberis glabrls vel basi parce pilosis, glandula 1 ventrali 

 anguste conica; feminei fructusque sessiles, dense sericeo-villoso-tomentosi; 

 styli distincti, circ. 1 mm. longi, saepe plusniinusve bifidi, stigmatibus brev- 

 issimis oblongis bifidis circ. 2§-plo longiores; glandula 1 ut in flor. masc; 

 fructus ovoideo-conici, 4.5-5 mm. longi, ut ovaria pilosi. — For furtlier 

 remarks see under S. BreiverL 



CLWIS SPECIERUM 



Folia anguste lanceolata; glandula florum satis longa etfere filiformis 4-5-j)lo long'or 

 quam crassa; antlierae ut videtur semper aureae 1. S. BrcwcrL 



Folia obtnuta; glandula brevlor et subcrassior 2|-3-plo longior quam crassa; an- 

 autlienu^ (salteni initio) violaceae 2. S. delnortensis. 



1. S. Breweri Bebb in Watson, Bot, Cal. ii. 89 (1879); in Bot. Gaz. xvl 

 100 (1891). — Jepson, Fl. Cal. 343 (1909). — When Bebb described this 

 species from specimens collected by W. H, Brewer **on San Carlos Moun- 

 tain in a dry ravine'' he spoke of it as of a ''genuine American re])resenta- 

 tivc of tlie Viminalcs'' Later (1891) he said; ''Beyond all comparison this 

 is the rarest and most obscure of the North American willows." Having 

 seen probably all available herbarium material I can speak as follows about 

 this peculiar si)ecies. The most complete description which has been given 

 of it is by Jepson, as Bebb did not know the male plant. Its normal upi>er 

 leaves are oblong or narrowly lanceolate to almost linear-lanceolate, meas- 

 uring from 1:0.5-1.2 to G: 0.8-1 cm.; they are rather dull green and never 

 quite glabrous above, and densely villose-tomentose beneath where the 

 reticulation is quite distinct. The petioles are very short, hardly up to 2 

 mm. long, and the stipules are wanting or ovate-lanceolate, and 1-3 mm. 

 in length. The almost sessile narrowly cylindric aments appear before 

 (or sometimes with) the leaves. The male aments measure up to 1.5-2: 

 0.5-0.6 cm., while the fruiting aments attain 3.5 : 1 cm. Both have yellowish 



