FLORA OF THE SAN ANTONIO MOUNTAINS 



107 



that a critical study will result in recognizing a large number of good 

 varieties and perhaps even several good segregate species. In the San 

 Antonio Mts. we have observed several forms of this plant. In dry 

 open ground in the lower parts of the pine belt the plants are very 

 open, the leaflets linear, folded and covered with rather dense, long 

 pubescence. The common form of the species, which has larger, broader 

 and unfolded leaves has two well marked forms of inflorescence. In 

 very dry sunny ground the racemes are elongated and few flowered, 

 and the flowers have long pedicels, 5-10 mm. long. Contrasted with this 

 form is the plant which has dense racemes of short pedicelcd, 2-4 mm. long, 

 flowers. A plant is common in Prairie Fork which we place under this species 

 with great hesitancy. The habit of growth is very different from the other 

 forms referred here, it being erect and branching above. The racemes are 

 short and of seemingly smaller, usually white, flowers. (Nos. 1269, 1469, 

 1488, 2086.) 



Lupinus cytisoides Agardh. Abundant along the streams in the upper parts of 

 Prairie Fork San Gabriel River and North Fork Lytle Creek, 6000-7500 ft. 

 alt., Upper Transition Zone. In the Lower Transition Zone it was only noted 

 at 5400 ft. alt. in San Antonio Canon. (No. 2074.) 



Lupinus elatus Johnston. The most conpicuous herbaceous plant in the area cen- 

 tering around Kellys Cabin. The plant flowers continuously from the middle 

 of June to late autumn, when it is killed to the ground by the frost. Its alti- 

 tudinal range is between 6500 and 8700 ft. alt. It is found on the low Cana- 

 dian Zone slopes above Kellys Cabin but it is apparently more at home on the 

 shaded slopes in the Upper Transition Zone. 



At the time the plant was described we knew it only from the type region but 

 we have since found it on the south spur of Cucamonga Peak where it was 

 common on what is sometimes known as Manzanita Flats, alt. 6500 ft. The 

 flowers range from flesh color to light blue. The plants collected on the 

 south slope of Cucamonga Peak are slightly lower than those at the type 

 station, and the leaflets are all under 6 mm. in length. (Nos. 1626, 1627, 2063.) 



Lotus nevadensis (Wats.) Greene. (L. Davidsonii Greene.) Fairly common in 

 dry open ground under the pines in the Lower Transition Zone. At Kellys 

 Cabin, located on the upper edge of the Transition Zone, alt. 8200 ft., this 

 plant is common on the small flats on which the cabin is located. This 

 station is unusual since the ordinary altitudinal range is between 5500 and 

 7000 ft. alt. 



Dr. Abrams (Fl. Los Ang.) says of L. Davidsonii, "very close to L. argophyl- 

 lus and may be only a form of it." We do not agree with this statement for 

 we believe that that species is identical with L. nevadensis (Wats.) Greene. 

 The "argophyllus group" can be separated from the "nevadensis group" by 

 its shiny-silk pubescence and its mucronate leaflets. These differences are 

 much better differentiating characters than the relative lengths of the pe- 

 duncles, which Abrams (i.e. 200, 1917) uses to separate them. We have found 

 that the peduncles are very variable in length, even in a single collection. 

 The lateness of the season in which the specimen was collected seems to deter- 

 mine, partly at least, the length of its peduncles. (Nos. 1423, 1552, 1458.) 



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