38 



22. Pileus with hairs in stalked pyramidal fascicles. Z. pyramidatvs B. & C. 

 Pileus not as above. 23. 



23. Pileus orange, hairs of two kinds, lanate and rigid. L. siparius B. & C. 

 Pileus cervinous, strigose ; stipe farinose above. Z. Nicaragnensis B. & C. 

 Pileus fuscous or fulvous. 24. 



24. Pileus small (1.25 cm.), membranous-coriaceous, totally covered with short 



deciduous fascicled hairs. L. Leprieurii Mont. 



Pileus 3 cm., fascicles of hairs toward the center, scattered and depressed. 



Z. sparsibarbis B. & C. 



25. Stipe thick, tapering downward, 4-5 cm. X S -10 mm - Z. castaneus Ell. & McB. 

 Stipe elongated, cylindrical, radicating, reaching 15 cm. X 3 _ 5 mm - 



L. vehitinus Fr. 



26. Very large ; pileus 15 cm., white, fulvous when dry. Z. vellertus B. & C. 

 Smaller ; pileus 2-6 cm., purplish, then reddish-brown. 



Z. strigosus (Schw. ) Fr. (= Z. Lecomtei Fr. ). 



THE PUBESCENCE OF SPECIES OF ASTRAGALUS 



By Francis Ramaley 



While making a study of leaf anatomy in the genus Astragalus, 

 a difference was noted in the character of the trichomes in the 

 different species. There are two kinds of hairs. Both are 

 straight and simple with small basal cell and elongated end cell. 

 In one kind of hair the end cell is straight and tapers to the 

 point. The basal portion is the thickest part of the cell. This 

 is shown in Fig. 1, which is a surface view of the lower epidermis 

 of Astragalus racemosus Pursh. In the other kind of hair, the 

 end cell is pointed cigar-shaped and attached some distance from 

 one of the ends. Fig. 2 shows the appearance of these hairs in 

 surface view of the lower epidermis of A. Caroliniamis L. The 

 mode of attachment will be recognized in Fig. 3, which is from 

 a vertical section of the leaf of the same species. These cigar- 

 shaped, double-pointed hairs are recorded for Astragalus by 

 Solereder, 1 but no figure is given in his work. He calls them 

 " two-armed " hairs. 



Specimens of eight species were examined by the writer. In 

 each of these eight, so far as might be judged from the material 



1 Syst. Anat. Dicotyledonen, 305. 1899. 



