22 



FLORA AND SYLVA, 



erst. Theilj 370 ; Sargent, " Silva of North America" 

 tt. 9, 10. M. Umbrella, Lam. Diet., 3, 673; " Nouveau 

 Duhamel," 2, 221 ; Gray," Manual of the Botany of 

 the Northern United States," 49. 



M. Watsoni. — At first sight this somewhat 

 resembles M. parviflora, but it differs from that 

 species in the yellow margin to the leaves — more 

 numerous nerves, which are ten to fifteen in num- 

 ber (as against six or eight in parviflora). The 

 flowers, too, are shortly stalked, larger, 5 to 6 

 inches in diameter, and have a powerful odour of 

 Allspice (Calycanthus). The petals are white and 

 open out more fully than do those of the last-named 



species ; the filaments are blood-red in colour and 

 the anthers themselves a dull reddish yellow. The 

 exact home of M. Watsoni is uncertain : Professor 

 Sargent thinks it is not Japanese, but may be Co- 

 rean. Unfortunately, so far, the exact requirements 

 of this beautiful Magnolia are not understood ; at 

 any rate it does not thrive in this country, as far as 

 my experience extends, so well as M. parviflora. — 

 Hook.fil., "Botanical Magazine" t. 7157. 



M. compressa (Maxim) zndM.fuscata (Andrews) 

 are now regarded as belonging to the genus Mi- 

 chelia, and are therefore not further mentioned in 

 these notes. 



George Nicholson. 



A REVISION OF THE GENUS CALOCHORTUS. 



Under the above title I wrote a monograph which was published in 1901 by 

 the Californian Academy of Sciences. It was a work intended for botanists, 

 and it was my endeavour to make it as complete as possible, and naturally it 

 contained much matter not of interest to those who are lovers and growers of 

 these lovely flowers rather than interested in them from the standpoint of the 

 field botanist. My kind friend the editor has asked me to prepare a version 

 of the work for Flora for garden use, and it is with pleasure that I endeavour 

 to comply with his request. The last few years have added somewhat to my 

 knowledge of the plants, and if any of my readers should note discrepancies 

 between the present and any former writings of mine upon the subject they 

 will understand that they are intentional, and that the present paper is correct, 

 to the best of my knowledge of the subject. While I shall in this paper give 

 some information in regard to the soils and conditions under which I have 

 observed some of the species to thrive, and, perhaps, some personal experience 

 of their culture, I am not attempting to go far into the matter of culture. 



Mr. George B. Mallet, in The Ga?~cien, has during the past year written 

 an excellent article upon the genus, and I feel sure that so good a grower, living 

 upon the spot, will have better learned what the plants require in the British 

 climate. The treatment he recommends for England varies but little from that 

 which my experience here tells me is the best. 



It is now some twenty-three years since I first became interested in Calo- 

 chorti, and in that period I have had the privilege of seeing many species in 

 their native homes, and of flowering nearly all of them in my garden. The 

 territory they inhabit is truly an immense one. On the north they extend into 

 British Columbia, on the south into Northern Mexico, on the east they cross 

 the Rocky Mountains, while on the west they go to the very brink of the 

 Pacific Ocean. Some of the species are very widely scattered, as, for instance, 

 C. Nuttalliy which extends the entire width of the great basin and across the 



