FLORA OF THE SAN ANTONIO MOUNTAINS ' 89 



The plants from the San Antonio Mts. and those from the San Bernardino 

 Mts. agree in having very short inconspicuous petals, rather large, little con- 

 torted fruit and stout, leafy, much branched stems that form dense, many 

 flowered panicles. This form is apparently the typical plant for the type was 

 collected by Lemmon on Grayback in the San Bernardino Mts. It thus ap- 

 pears that vestita was described through a misconception as to what consti- 

 tuted the true corrugata and that the well marked variation on Mt. San Jacinto 

 through which this misconception arose, is still without a name. (Nos. 

 1279, 1416, 1609.) 



Sisymbrium canescens Xutt. Dry sandy ground in the lower part of the pine 

 belt Common in the chaparral belt 



Dentaria californica Nutt. Rare in cool, moist places in the lower parts of the 

 pine belt; frequent in the Upper Chaparral Belt. 



Arabis arcuata Gray. Frequent in dry rocky ground throughout the Lower Tran- 

 sition Zone. It descends the canons on the south side and reaches a minimum 

 altitude of 1000 ft. in the gravelly wash of San Antonio Canon. 



The pine belt form has its pods uniformly shorter than the Tapper Sonoran 

 plant. The valley and chaparral belt plant has pods 7-9 cm. long; the pine 

 belt form has its pods only 3-5 cm. in length. (Nos. 1359, 1589, 1951, 1952, 

 1956, 1973.) 



Arabis glabra (L.) Bernh. Occasional in the lower parts of the pine belt; common 

 at lower levels. 



Arabis repandaW&ts. Frequent in dry open ground under the pines in the Upper 

 Transition Zone. (Nos. 1464, 1663.) 



Arabis platyspcrma Gray. Frequent under the pines in the Upper Transition 

 and Canadian Zones. Exceedingly abundant in the vicinity of Kellys Cabin. 

 A single plant was found on Baldy Summit. (Nos. 1465, 1560.) 



Erysimum asperum DC. Common in dry open ground under the pines in the 

 Lower Transition Zone. 



Streptanthus campestris Wats. var. bernardinus (Greene) Johnston, comb. nov. 

 Agianthxis bernardinus Greene. Shaded ground under the pines in South 

 Fork Lytle Creek, alt. 6000 ft. 



This variety is a lower and more slender plant than the species with smaller, 

 yellow flowers which have recurved sepals. Though quite distinct in their 

 extremes, the species and the variety are well connected by intermediate 

 forms. (No. 1477.) 



Caulanthus amplexicaulis Wats. Common in dry situations throughout the 

 Transition Zone. (Nos. 1267, 1467.) 



CRASSULACE.E 



Dudleya pumila Rose. D. minor Rose. Not uncommon in crevices of granite. 

 Usually found on sunny ledges but occasionally also in shaded canon walls 

 where it takes on a different form. 



In exposed situations this plant has compact rosettes of very glaucous 

 nearly ovate leaves. The stem averages less than 5 cm. in height bearing 

 densely flowered (30 per. plant) compounded cymes of reddish colored flowers. 

 When the plant grows in a cool canon the rosette is very much looser and the 



