EXPLANATION OF PLATE XXXI. 



PAGE 



BACCHARIS URVILLEANA Brongn. . 810 



This plate, of an undescribed species, is a replica of Plate 61 in Brongniart's 

 Voyage de la Coquille (1828-29). Prepared for us through the courtesy of Professor 

 Lloyd and of the New York Botanical Garden. 



A. Branch of fertile plant, showing the opposite leaves, and the corymbed heads 



of pistillate flowers. 



B. Branchlet of the sterile plant, with its heads of hermaphrodite, non-fertile 



flowers. 



Figs, i, 2. Fertile capitulum, and a flower of the same ; the latter showing the prob- 

 ably 5-costate achenium. 



3. Style-branches of the fertile flower. 



4. Tip of one of the bristles of the pappus, much magnified. 



4, 6, 7. A sterile (hermaphrodite) capitulum, also one of its rudimental ovaries, 



and one of its flowers, with the protruding stamens. 

 8. Two of the anthers, showing their apical appendage, and their basal 



rounded lobes. 

 Figs, i and 5 also show the imbricating, subequal, involucral scales. 



(VOL. vin.) 



