THE PLANT WOKLD 185 



the cacao tree {Theohroma Cacoa), and under the shelter of its foliage, 

 the shrubby Cqfea Arabica. This industry, -brought from Hayti and 

 San Domingo by emigrating Frenchmen early in the last century, and 

 once prosperous and lucrative, is now falling into decay, although the 

 climate, soil and altitude are suitable and the quality of both fruits 

 excellent. 



The breadfruit or arbol del pan {Artocavpus incisa), is a tall tree 

 seen in many gardens, with huge, roundish, pinnatifid leaves, cultivated 

 more for ornament than use, although the excellent flavor of its large, 

 farinaceous iruit, eaten either baked or boiled, will be a revelation to 

 the uninitiated. 



Havana, Cuba. 



SOME INTERESTiNG CASES OF PLANT DISTRIBUTION. 



By John M. Holzinger. 



IT is now twelve years since the writer found Clayfonia Chamissoi 

 more than a thousand miles out of its range, discovering a colony 

 of this si:)ecies at the foot of Queen's Bluff in southeastern Minne- 

 sota. It ranges throughout the Rocky Mountain system of North Amer- 

 ica, from New Mexico to Alaska, and occurs mostly at altitudes varying 

 from 6000 to 9000 feet above sea level, apparently rarely descending 

 below 5000 feet, as is attested by a long series of herbarium specimens 

 from upward of fifty localities in the National Herbarium, a complete 

 list of which was furnished by the courtesy of Mr. F. V. Coville. Not 

 a single station is known outside of that range in the intervening belt 

 of a thousand miles and more of the Great Plains, except the little 

 patch at the foot of Queen's Bluff. 



To this single flowering plant have been added in the past ten 

 years of field work, six similar cases of distribution of mosses. It is 

 necessary to briefly take them up in order. 



1. Coscinodon Raid is a common moss on boulders of calcareous 

 sand rock near the tops of bluffs about Winona, some 500 feet above the 

 Mississippi, or 1300 feet above sea level. Outside of this area it is so 

 far known only from Colorado, where it rarely occurs at an altitude of 

 less than 5000 feet. 



2. Coscinodon Wright ii occurs in similar situations, both near Win- 

 ona and in Colorado. It is, however, known also from Kansas, Texas, 

 and New Mexico, but not from points intermediate. 



3. Ditrichum fiexicaide hrevifoUum {D. elatnm Kindb.) occure at the 

 same altitude on our bluffs as the Coscinodons, but grows usually in 



