FLOWERING PLANTS OF NANTUCKET 241 
dex Seminum Hortus Botanicus Imperialis Petropolitanus wherein 
the name appears. But a description, presumably a transcript of 
the original, is found in Walper’s Repertorium (6: 722. 1846-7). 
Therein we read, ‘‘Jigulae amoene roseae.”” The correlation is thus 
evidently with G. caracasana (DC.) Sch. Bip. and not with our 
white-rayed species. Another name requiring to be considered 
is Wiborgia urticaefolia H. B. K. (G. urticaefolia Benth.). An 
excellent illustration of this plant accompanying its description 
(Nov. Gen. et Sp. 4: 257. pl. 389. 1820) shows that it is closely 
related to our species but differs by larger rays and the absence 
of a pappus. G. Humboldtii Heiron. (Bot. Jahrb. 28: 618. 1899- 
1900) based on a variety of G. urticaefola, which is cited as a 
synonym, differs in having a short coroniform pappus, thus exclud- 
ing our plant with elongated attenuate or aristulate pappus scales. 
In some respects the characterization of G. quadriradiata Ruiz & 
Pav. (Syst. Veg. 198. 1798) might seem to refer to our plant 
but, as a whole, it is more descriptive of, and clearly applicable 
to, a mere form of G. parviflora Cav. (G. quinguiradiata Ruiz & 
Pav. 1. c.), as was long ago determined by De Candolle. 
ACHILLEA MILLEFOLIUM L. 
Fields and roadsides, flowering from early June until October. 
In its best developed state it is often only slightly pubescent, and 
is branched above the middle to form an ample compound corymb, 
the heads having rays 2.5-3.5 mm. broad. Reduced and more 
pubescent forms of poorer soils have more contracted leaves and 
are unbranched, bearing a single terminal corymb of somewhat 
smaller heads. 
Dr. Rydberg, who has examined my Nantucket collections of 
Achillea, finds that certain specimens are quite clearly referable 
to the plant recognized in Europe as A. asplenifolia Vent. (A. 
rosea Desf.), in which the flowers are prevailingly rose color to 
magenta, and the ultimate subdivisions of the leaves finally 
thickened and callous at the ends below the cartilaginous pointed 
tip. The status of this plant, however, seems not to be eae d clear, 
and the question of its formal recognition may well await a better 
understanding of its relationship to A. M illefolium. 
*ACHILLEA OCCIDENTALE Raf. 
Specimens of this have been determined by Dr. Rydberg who 
