72 ERYTHEA. 



hills. Upper calyx-lip cleft, lower entire or occasionally with the 

 minute teeth: keel ciliate above except the extreme tip: fork very 

 sparsely ciliate. The leaves on these specimens on account of the 

 increased length of some of the hairs appear ranch less silky than 

 in the type. 



L. destsiflorus Bentb. From Newhall to the desert; frequent. 

 Keel densely ciliate on posterior third above: a few scattered cilia 

 on fork: usually a few hairs on anterior edge of the base of the 

 lateral petals. 



L. brevicaulis Wats. Lancaster and surrounding desert. Keel 

 smooth. 



L. concinnus Agardh. Calyx above deeply cleft, the lobes 

 widely divergent: lower 3-toothed. Petals hairless. Bracts per- 

 sistent until ripening of fruit. 



L. BREWERiGray. Bear Valley, San Bernardino. Keel ciliate 

 in middle third. 



NOTES ON THE FLORA OF MARIN COUNTY, 

 CALIFORNIA. 



By Alice Eastwood. 



Erigeron angustatus Greene and Erigeron petrophilus Greene are 

 both found on Mt. Tamalpais. The former is abundant on the trail 

 leading down to the Potrero, the West Point Trail and the Boot- 

 jack Trail. The latter grows on the rocks along the steep trail that 

 leads to the spring not far from the summit of the East Peak. These 

 bloom during the summer. 



Pentachceta beilidi flora Greene has been found by Miss Margaret 

 Adamson covering the hills above Larkspur. In Greene's Manual 

 of the Botany of the Bay Region this species is said to be rare. 



Rhododendron Califomicum is on Mt. Tamalpais. In Greene's 

 Manual of Botany of the Bay- Region x this species is not included. 

 There are, however, some localities on Mt. Tamalpais where it is 

 quite abundant and where it can be found in bloom during May. 

 On the ridge separating Mill- Valley from Sequoia-Canon, the little 

 gulches on the eastern exposure are gay with the blooming bushes. 

 They can be plainly seen from the summit of the ridge on the 



