270 TRANS. OF THE ACAD. OF SCIENCE. 



B. Stone thick, much longer than wide. 



a. Stone somewhat compressed ; albumen not (in 10) or 



slightly (in 11) ruminated. 



10. V. scabrellum (Mississippi), with one wide 



ventral groove, - - - 7 mm. long, 4^ mm. wide. 



11. V. lantanoides (Massachusetts), with six 



djstinct grooves, - - - 7 " ** 6 " 



b. Stone oval or subglobose, not compressed. 



a. Stone with a narrow and deep ventral groove ; 

 albumen deeply excavated, slightly ruminated. 



12. V. microcarpum (Mexico) - - 4 mm. long. 3^ mm. wide. 



13. V. odoratissimum (India) - - 8-9 " " 5£ " " 



/?. Stone with very slight grooves, albumen oval, 

 not excavated, very deeply ruminated. 



14. V. Tinns (Southern Europe) - 6A-8 mm. long, 5-5± mm. wide. 



15. V. rwjosum (Canary Islands), - 8-9 " " 5-6 " 



The stones of V. prunifolium and Levtago he was unable to distinguish, 

 and he almost felt inclined to unite both, as, in our neighborhood at least, 

 the former was a most variable plant with broad or narrow, obtuse, 

 acute or acuminate, glabrous or rusty leaves, and larger or smaller 

 flowers, growing in rocky woods or in deep bottoms, and with many 

 approaches to the eastern V. Lenlago, which, in its typical form, was not 

 found here. 



In V. nudum and still more in V. obovahim, the markings so characteris- 

 tic of V. aceri folium are already present, though not very distinct. 



The stones of the European and the American V. Opulus which he could 

 examine, were all broadly oval and longer than wide; but a few specimens 

 of what was labelled V. edule had stones broader than long and deeply 

 emarginate at base; further investigation must show whether this is a 

 constant character, perhaps with others sufficient to re-establish that 

 species of Purshian. The only fruit of V. dentatum he could examine was 

 unripe, and the stone was no doubt narrower than it would be in the 

 ripe berry. 



Among the fruits of Vibvrna, mostly from the East Indies, obligingly 

 communicated by Prof. A. Gray, he found those of V. punctatum similar 

 to V. nudum, though larger ; V. erosum, of Japan, with a lenticular irre- 

 gularly marked stone, might also belong here ; V. oriental/', of the 

 Caucasus, was the representative of our V. acerifotium ; the red-fruited 

 V. cotinifolium, premnaceum, stellulatum, and perhaps CoHrookianum, had 

 stones similar to our black-fruited dentatum and pubescens, though nar- 

 rower. The stones of V. plicaium, of Japan. V. Simonsii, erubescens, 

 and also of grand ijloruni, were like those of our V. scabrellum. 



For those species of Viburnum, he had more fully examined, he would 

 suggest the following arrangement, in which he had been obliged to 

 overlook the presence or absence of a radiated inflorescence, which here- 

 tofore constituted the principal character of the sections of this genus : 



1. Opulus would comprise species 5-7 with lobed leaves, radiated or 

 uniform cymes, red or black-red berries, and flat, smooth or marked 

 stones. 



2. Lentago with species 1-4 ; leaves serrulate or sometimes entire, 

 glabrous or squamulate, cymes even, berries bluish-black, stones flat, not 

 or scarcely marked. 



3. Lantana with species 8-11 ; leaves finely or coarsely dentate, glab- 

 rous or often with stellate pubescence, cymes even or, rarely, radiate, 

 lurries bluish-black, stones strongly marked, compressed or tumid. This 

 section might be subdivided according to the form of the stones above 

 described. 



