333 



• 



any of the specimens, may be accounted for by these two 

 circumstances. There are scars at the base of each peduncle, 

 but whether bracteae or leaves have fallen away, I am un- 

 certain. Many heads of flowers remain, but they are all 

 barren; yet, from these and from the perfect fruit, (that most 

 important organ in the classification of Umbelliferous plants,) 

 there cannot be a question of its belonging to the same genus 

 as the preceding. The stem is glaucous, striated, rounded, 

 rough to the touch between the striae. Some of the lower 

 branches are spinous, and appear to be abortive peduncles. 

 Barren flowers with large calycine teeth, and petals which 

 have a much less distinct tubercle than those of A. chilense, 

 quite entire, with a comparatively short acute incurved point. 

 Fruit larger, broader in proportion to its length, more brown, 

 shining, and membranaceous than the preceding, yet in 

 general structure it is the same. 



In another part of Dr. Gillies's Chilian Collection is a 

 solitary specimen of a plant, which, different as it may appear 

 in habit from those now under review, I am yet inclined to 

 consider the young state of the same species ; in it there 

 are many radical and several remote cauline leaves^ petiolated, 

 cordate, 3-lobed, waved at the margin, and spinuloso-dentate. 

 The umbels are compound, scarcely reaching above the leaves, 

 and they probably run out into a corymbose panicle in age. 

 There are barren flowers mixed with the perfect ones, and 

 their structure is very similar to those of our A. polyceplialum. 

 I should observe, however, that this plant was found by Dr. 

 Gillies, not in Chile, but in the valley through which the 

 river Salado runs, and near where it issues from the mountains 

 at the southern extremity of the province of Mendoza. 



Tab. LXVII. B. Fig. 1, Head of barren flowers: nat. 

 size. Fig. 2, Single barren flower. Fig. 3, Back view 

 of a petal. Fig. 4, Front view of do. Fig. 5, Head or 

 umbel of fruit: — nat. size. Fig. 6, Fruit. Fig. 7, Trans- 

 verse section of the same. Fig. 8, One of the carpels, 

 still suspended by its bifid axis ; the others having fallen 

 away : — all but figs. 1 and 5 magnified, 



VOL. I. z 



