Evans: Notes on genus Herberta 217 



however, was based on specimens in the United States National 

 Herbarium, which, in the writer's opinion, represent a slender 

 form of Anthelia julacea (L.) Dumort. This species is now known 

 from several localities in Alaska, and additional specimens, essen- 

 tially like those of Merriam, were collected on St. Paul Island, in 

 1897, by T. C. Kincaid {49). 



The narrower and more deeply divided leaves of H. Hutchin- 

 siae, with their more slender and strongly curved divisions will 

 usually distinguish the species from H. adunca at a glance. In 

 doubtful cases the distinct vitta extending far out into the divisions 

 will decide the determination. The more gradual tapering of the 

 divisions is clearly brought out by counting their width in cells. 

 \n H. Hutchinsiae, if the counts are made at a distance of 0.2 mm. 

 from the apices, the divisions are found to have a width of from 

 two to four cells; in H. adunca the corresponding counts will 

 usually give from five to eight cells. Counts at the bases of the 

 divisions are much less conclusive, on account of the fact that the 

 divisions in H. Hutchinsiae are relatively longer, the bases there- 

 by being often as wide as in H. adunca. 



Among the specimens listed above, those from Norway are 

 somewhat aberrant. Although some of the shoots conform closely 

 to the type, others bear leaves which are considerably larger. 

 One of the largest leaves measured had a length of 2.4 mm. and a 

 width of 0.95 mm. ; another, a length of 2 mm. and a width of i mm. 

 The dorsal divisions of these measured, respectively, 1.2 X 0.45 

 mm. and i .05 X 0.4 mm. Since these leaves are relatively broader 

 than is usual, it might appear at first sight as if the large-leaved 

 shoots approached H. adunca, but the distinct vittae present would 

 seem to preclude this idea. In all probability they represent 

 shoots developed under unusual conditions, perhaps exceptionally 

 favorable from a nutritive standpoint ; the large leaves might then 

 be regarded as abnormal. 



The androecia in H. Hutchinsiae are not absolutely constant in 

 position. In normal cases they are borne on the secondary stems 

 just as in H. adunca. Under these circumstances an androecium 

 usually proliferates at the apex and then produces a new androe- 

 cium after a short series of vegetative leaves. In several instances, 

 however, androecia on ventral or lateral branches have been 



