■DICOTYLEDONOUS PLANTS 173 



cymes. Bracts of the involucre xnivplish, thin and dry, in 

 several ranks. Most of the flowers are fertile, the sterile 

 ones in the center are purplish or sometimes white. Pappus 

 of fine, capillary bristles, in a single row. 



P. camphora'ta DC. Leaves oblong-ovate to broadly lance-shaped, 

 nearly sessile, irregularly toothed. The entire plant has a heavy, 

 aromatic odor. In salt or alkaline marshes. 



Xn. ANAPH'ALIS, Pearly Everlasting 



Dioecious, perennial herbs, with white-woolly foliage. 

 Involucre of many rows of snow-ivhite, papery scales. Style 

 2-cleft, only at the apex. Pappus a single series of capillary 

 bristles falling separately. 



A. margarita'cea Benth. & Hook. Stems 1-3 ft. high, leafy up 

 to the broad compound corymb. Leaves narrow, lance-shaped, 

 1-nerved, becoming green and smooth above. Scales of the invo- 

 lucre pearly white, not longer than the flowers. Widely distributed. 



Xm. GNAPHAXIUM, Everlasting, Cotton-batting Plant 



Annual or perennial white-woolly herbs, with whitish or 

 yellowish flowers. Heads with both staminate and pistillate 

 floiuers, the latter fewer and in the center. Involucre of several 

 ranks of papery or papery-tipjped scales. Styles in perfect 

 flowers, 2-cleft. Pappus of capillary bristles in a single row. 



a. G. decur'rens Ives. Stems usually several from the woody root, 

 1-3 ft. high and rather stout, glandular under the dense wool. Leaves 

 lance-shaped, icith the blade extending down the stein. Heads many in 

 dense corymbs terminating the stems. Involucre bell-shaped, of 

 many papery scales in several ranks. The plant has a peculiar odor, 

 something like licorice. It is common and widely distributed along 

 the coast. 



b. G. microceph'alum Nutt. Perennial herbs, with slender, erect 

 stems 2 ft. or more high, loosely branched above, white, with a close 

 wool. Leaves linear, the lowest spatulate. Involucre small, loith 

 bright, white, obtuse bracts. The herbage is odorless, not glandular. 



c. G. ramosis'simum Nutt. Perennial herbs with erect stems, 

 3-6 ft. high, viscid, green, with woolly covering not abundant. 

 Heads in loose panicles, small, often with jnnk involucres. Leaves 



