

, ...... 



CATALOGUE OF SPECIES. 19 ( J 



Brewery Spring, in the Panainint Mountains (No. 598). It ranges throughout Cali- 

 fornia, and is known to occur in Oregon. It lias been found in Guatemala at 1,900 

 meters altitude (No. 333 of John Donnell Smith's distribution), and presumably occurs 

 at intermediate stations. 



Salix lasiolepis Benth. PI. Hartw. 335 (1857). Type locality, "ad ripas fluvi- 

 orum Salinas et Carinel prope Monterey," California. 



Collected on the south slope of Cajon Pass, San Bernardino Mountains (No. 129), 

 Johnson Cafiou, and Surprise Canon, Panamint Mountains (Nos. 493, 597, 625), and near 

 Visalia(No. 1268). The species is very common through the whole State of Califor- 

 nia—which may be regarded as the center of its area of distribution— northward, 

 mainly as variety bigelovii, as far as Seattle, Washington; southward in Mexico and 

 on the peninsula of Lower California (Prandegeo) to within the tropicsat an altitude 

 of 1,500 meters. It varies exceedingly in the form of the leaves, the more or less 

 densely ilowered aments, and even from forms with densely clothed scales (which 

 suggested the name), to those like the present, with scales only thinly hairy. 



Salix longifolia Muhl. Neue Schrift. Gesell. Naturf. Freunde Berlin, iv. 238 

 (1803). Type locality, "ad Susquehannam," i. e., near the Susquehanna River, in 

 Pennsylvania. 



Collected in Furnace Creek Canon, Funeral Mountains (No. 215); in Pahrump 

 Valley, Nevada (No. 294); at Furnace Creek Ranch (No. 468); at Hot Springs, Pana- 

 mint Valley (No. 681) ; and in Surprise (No. 722) and Willow Creel: (No. 788) canons, 

 Panamint Mountains. 



This species in various forms occurs in Mexico, Texas, Louisiana, and northward 

 throughout the Mississippi basin and the region of the Great Lakes to latitude 

 60° N. in the valley of the Mackenzie River. It is common and reaches its fullest 

 development in the Pacific, coast States, while east of the Allegany Mountains it 

 occurs rarely from the valley of the Potomac River to New Brunswick. The longi- 

 folia; whether considered in the aggregate as an exceedingly polymorphous species or 

 as "a congeries of species in the making," including S. taxifolia, S. Hcusilifolia, etc., 

 present a strongly marked group of willows peculiar to America. Not connected 

 with Old World forms by any synthetic type of the present or, so far as known, of 

 any preceding period of time, its abundance and diversity, both in form and stature, 

 on the Pacific slope, and gradual decrease, both in vigor and variability, throughout 

 its range northeastward, are facts which sustain the conjecture that the group was 

 derived from the Mexican plateau at the close of the Tertiary period. 



Salix longifolia argyrophylla (Nutt.) Sylv. i. 71 (1842-53), as 8. argyropkyllm; 

 Anders. Kongl. Sven. Akatl. llandl. [ser. 4] vi. 55 (1865). Type locality, on "one 

 of the branches of the Oregon, the river Boisee, towards its junction with the 

 Shoshonee." 



Collected near Visalia (No. 1267). 



Salix longifolia exigua (Nutt.) Sylv. i. 75 (1842-53), as S. exigua; Bebb, Bot. Cal. 

 ii. 85 ( 1880). Type locality, " the territory of Oregon," growing with Nuttall's Salix 

 fluviaiilix, which was first collected on " the immediate border of the Oregon [River], 

 a little below its continence with the Wahlamet." 



At Resting Springs (No. 263). 



Salix macrocarpa argentea Bebb, Bot. Gaz. x. 223 (1885). Type localities, 

 "Sierra County," and "Plumas County," California. 



This is the Salix gcycriana of the Botany of California, not of Andersson. The typi- 

 cal S. macrocarpa is a species of the Columbia River Valley and Paget Sound region, 

 while the variety argentea is known only from the Sierra Nevada of California. It 

 was collected by the expedition in a natural meadow in the Sierra Nevada, near 

 Mineral King (No. 1427). 



Salix nigra venulosa (Anders.) Monogr. Sal. 22 (1867), as a form, renulom, of Salix 

 nigra longipes; Bebb, Bot. Gaz. xvi. 102 (1891). Type locality, " in Nova Mexico." 



