294 We g&artrett's Storg. 



species are aster icus, integrifolium, trifolia- 

 tum, terebinthinaceum, and asperrimiim, all 

 with yellow flowers, and albiflorum, with white 

 flowers. The proper place for most of the 

 Silphiums is the rear garden, or the edge of a 

 distant shrubbery, in masses. But S. perfolia- 

 tum is always worthy of a topmost seat in the 

 garden synagogue, when in bloom. The He- 

 leniums are tall-growing plants, with large yel- 

 low or orange flowers, similar to Rudbeckia. H. 

 autumnale, the most common of the genus, is a 

 conspicuous plant, growing from two to three 

 feet high. H. Hoopesi is a coarse plant, grow- 

 ing three to four feet high, flowering in August 

 and September. The flowers are showy, pro- 

 duced in umbels ; the color of rays and disk is 

 uniform bright orange. H. pumilum is the 

 smallest and perhaps the poorest of the genus, 

 none of which take the place of the Helianthus 

 or some of the Silphiums. 



Helianthus rigidus, generally known as Har- 

 palium rigidum, is a very striking early species, 

 with large, brilliant, dark-yellow flowers. It is 

 the lowest-growing of the genus, not exceeding 

 four feet in height. Its habit is to run much at 

 the root, and therefore it soon becomes trouble- 

 some in the flower-border. But it should not be 

 neglected on this account, and a place should be 



