108 I. M. JOHNSTON 



Lotus argophyllus (Gray) Greene. (Hosackia argophylla Gray var. decora John- 

 ston.) Most common in rocky ground in the lower part of the pine belt, 

 frequent in the Upper Chaparral Belt and not uncommon in gravelly washes 

 near the canon mouths. (Nos. 1278, 1737.) 



Lotus Heermanni (D. & H.) Greene. Occasional in moist sand along creeks in 

 the Lower Transition Zone, much more common at lower levels. (No. 1657.) 



Lotus oblongifolius (Benth.) Greene. Occasional in moist ground in the Lower 

 Transition Zone. 



Lotus crassifolius (Benth.) Greene. Occasional in dry open ground, Upper Cha- 

 parral Belt and Lower Transition Zone. (Nos. 1495, 1751.) 



Lotus strigostis (Nutt.) Greene. Under the pines at 5700 ft. alt. in San Antonio 

 Canon. 



Lotus americanus (Nutt.) Bisch. Lower edge of the pine belt at 5000 ft. alt. in 

 Prairie Fork. 



Trifolium monanthum Gray var. Grantianum (Heller) Parish. Common in 

 springy places in the Transition Zone above 6500 ft. alt. (Nos. 1392, 1550.) 



Astragalus Parishii Gray. This species was collected by Hall (Nos. 1248, 1531) in 

 Swartout Valley at 6700 and 6862 ft. alt. 



Astragalus lentiginosus Dougl. var. Fremontii Wats. Frequent under the pines on 

 the broad, dry, sandy floor of Prairie Fork, ascending the canon to 6500 ft. 

 alt. This and the next were determined by Prof. M. E. Jones. (No. 1655.) 



Astragalus bicristatus Gray. Growing with the last in Prairie Fork but also on 

 the west end of Ontario Peak in Cascade Canon, where it is common under 

 the pines, 6000-7000 ft. alt. Both stations are in the Lower Transition Zone. 

 (Nos. 1656, 2039, 2056.) 



EUPHORBIACEiE 



i 



Tithymalus Palmeri (Engelm.) Abrams. Collected by Dr. Hall (No. 1532) in 

 Swartout Canon at 6800 ft. alt. 



ACERACE.E 



Acer macrophyllum Pursh. Common along streams in the Upper Chaparral Belt 

 and Lower Transition Zone. Reaching 7300 ft. alt. (No. 1568.) 



RHAMNACE^J 



Rhamnus calif omica Esch. Frequent in dry sunny ground throughout the Tran- 

 sition Zone, reaching an altitude of 8300 ft. (No. 1568.) 



Rhamnus calif omica Esch. var. tomentella Brew. & Wats. Seen only in Prairie 

 Fork San Gabriel River and in North Fork Lytle Creek, where it grows with 

 the species. Connecting forms were common. The plants from Lone Pine 

 Canon, which Abrams (Bull. N. Y. Bot. Gard. 6:407, 1910) cites under R. 

 cuspidata Greene, are the same. Lower Transition Zone. (No. 1709.) 



Rhamnus crocea Nutt. var. ilicifolia (Kell.) Greene. Occasional on dry sunny 

 slopes throughout the Transition Zone. One plant was noted at 8250 ft. alt. 

 on the steep south face of Ontario Peak. 



