424 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
Squam, and Sachacha. Elsewhere seen only among the Miacomet 
Pines, a few small plants, 1909, and west of Reed Pond, a single 
sprout, 1908. Close panicles of green buds July 11, 1912. On 
Nantucket this sumac is not ordinarily over two to four feet 
high, only exceptionally reaching a stature of five or six feet, and 
it is often the merest dwarf. The smallest fruiting plant seen 
was only six inches high, including a fruiting panicle 24 inches 
long and 14 inches thick. The largest fruiting panicle observed 
was 334 inches long by 21% inches thick. 
Much variation in the leaves is shown even among plants of 
the same colony. The more common type of leaflet is lanceolate, 
sharply serrate, and the color of the upper surface rather a dull 
green. Side by side with plants so characterized occur others 
having much broader, subentire leaflets, dark shining green above 
and unusually whitened beneath. 
TOXICODENDRON VERNIX (L.) Shafer. 
Frequent, or rather common, in bogs throughout. Leaves 
beginning to appear June 1, 1909; leaves very small and un- 
developed June 10, 1911. 
TOXICODENDRON VULGARE Mill. 
Abundant and of wide variation, quite probably including more 
than one species. Dr. E. L. Greene, who has kindly looked over 
my series of specimens, is rather definitely of this opinion, but 
points out to me that no pronouncement should be made i the 
absence of mature fruit. My collections, all made in June, beat 
panicles of buds or freshly opened flowers and clusters bi the 
weathered fruit left over from the year before and having little or 
nothing remaining of the pericarp. The most abundant form on 
Nantucket is the common erect shrubby plant of low grounds, 
with ovate, often subcordate, shining leaflets, more OF less rusty 
pubescent on the veins beneath, and globose or depressed pie 
pubescent fruit. Very similar but taller and sometimes high- 
climbing forms have thinner, less shining leaves, often cuneate : 
the base, and differ further in their more diffuse inflorescence an 
rather larger flowers. A form with essentially similar inflorescence 
keeps to the ground in pine groves, running among the eapls 
pine needles and putting up short erect branchlets from its ph 
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