120 I. M. JOHNSTON 



Aster canescens Pursh. A discoid form, which has also been collected in Swar- 

 tout Valley, (Geo. R. Hall, Sept. 1904), is very common in dry rocky ground 

 under the pines, 6000-7000 ft. alt., in Prairie Fork. (No. 1647.) 



Aster Menziesii Lindl. A large colony in Prairie Fork about a quarter mile below 

 the Native Son Mine. The plant grew on a sunny but moist bank covering 

 it to the exclusion of all other plants. Lower edge of the Transition Zone, 

 alt. 5000 ft. (No. 1640.) 



Erigeron jacinteus Hall. Several small colonies were found growing among the 

 loose rocks on the exposed summit of Little Baldy. Canadian Zone, alt. 

 9550 ft. 



This is a very well marked species and is quite distinct from Leucelene eri- 

 coides to which it was reduced by its author (Univ. Cal. Pub. Bot.3:86, 1907). 

 It is separated from all forms of that variable species by its larger hemi- 

 spheric heads, by its darker and not scarious margined involucre-bracts and 

 by its decidedly broader spathulate leaves. The whole plant is cinerous 

 with coarse, nearly hispid, hairs and is composed of rather few, long, loosely 

 spreading stems. The disk flowers are more numerous and darker in color. 

 The plant has the oblong, obtuse style-branches that characterize both 

 Leucelene and Erigeron; the general appearance of the plant, however, is 

 very decidedly that of the latter genus. 



This species has been collected only in the San Jacinto Mts., the type 

 region, and in the San Antonio Mts. Leucelene ericoides is known from Cal- 

 ifornia only by a collection made in the Providence Mountains on May 30, 

 1902 by Mr. Brandegee. (No. 2082.) 



Erigeron foliosus Nutt. var. stenophyllus (Nutt.) Gray. Frequent in dry sunny 

 ground throughout the Transition Zone. On the upper edge of the Transi- 

 tion Zone at 9500 ft. alt. on Pine Mt. (No. 1682.) 



Erigeron diver gens T. & G. A single plant growing in wet ground at the Native 

 Son Mine. Collected by Hall in Swartout Valley (Univ. Cal. Publ. Bot. 3: 

 93, 1907.) (No. 1708.) 



Antennaria dimorpha (Nutt.) T. & G. A large colony in very dry rocky ground 

 along the trail in Coldwater Fork Lytle Creek, alt. 6250 ft., Lower Transition 

 Zone. (No. 2060.) 



Gnaphalium microcephalum Nutt. Occasional in dry sunny situations in the 

 Transition Zone. (No. 1698.) 



Gnaphalium chilense Spreng. Wet ground at the Native Son Mine. 



Helianthus gracilentus Gray. Frequently found under the pines in the lower 

 portions of the Transition Zone. Reaching 6000 ft. alt. (No. 1457.) 



Hemizonia Wheeleri Gray. Abundant under the pines at 6000 ft. alt. in South 

 Fork Lytle Creek. Lower Transition Zone. (No. 1475.) 



Eriophyllum confertiflorum (DC.) Gray var. trifidum (Nutt.) Gray. Frequent 

 under the pines, mostly in the Lower Transition Zone. Not detected in the 

 San Antonio Canon watershed, where it is replaced by the next variety. ■ 

 (No. 1452.) 



Eriophyllum confertiflorum (DC.) Gray var. discoideum Greene. Noted only in 

 the San Antonio Canon watershed where it is common in dry ground under 

 the pines in the Transition Zone, ranging from 5000-8000 ft. alt. 



