148 
FIFTEENTH REPORT. 
common at Douglas Lake in the dry sands of the aspen association, 
where it grows in company with Hieracium venosurn. 
B. Species of considerable rarity in the State. 
1. Streptopus longipes Fernald. The species was recently described 
from Marquette County, in the Upper Peninsula, but is common at 
Douglas Lake in the dee]) shade of the hardwood forests. Here it 
grows in company with Streptopus roscus , but the two are at once dis- 
tinguished by 1 he three-angled berries of S. longipes , as was indicated by 
Dr. Gates. 
2. Arccuthobium pus ilium Peck. Although the plant has frequently 
been reported from the State, its diminutive size makes it very incon- 
spicuous, and its rediscovery is always a matter of interest. At Douglas 
Lake it has been observed only on the short-leaved bog form of Picea 
mariana. The specimens collected never exceed 7 mm. in height. 
3. Ranunculus Flammula L., var. reptans (L.) Mey. Rare, in wet 
ground near Hie shore of Douglas Lake. 
4. Clirysosplenium amcricanum Schwein. A very dwarf form, with 
a tendency to minute pubescence, grows in wet sand at the north end 
of Burt Lake. 
5. Piles hudsonianum Richards. The collection by Dr. Gates, re- 
ferred to this species, has not been examined, but specimens collected 
by Miss Robertson in the deep shade of wet cedar bogs have been verified 
by comparison with authentic material in the herbarium of the New 
York Botanical Garden. So far as known, this is the second station 
for the species in the eastern States. The ripe red berries are minutely 
black glandular and very fetid, and both of these characters disappear 
in pressing. 
C. Species not listed in Beal’s Michigan Flora, and not collected by 
Dr. Gates. They are therefore apparently new to the state. 
1. H (then aria macrophylla Goldie. In damp thickets on the north 
shore of Douglas Lake. It is distinguished at once from the commoner 
Habenaria orbiculata by the spur, which is nearly twice as long. The 
species is credited to Michigan in Gray’s New Manual. 
2. Rumex elongatus Guss. An introduced species, growing along 
logging roads in the vicinity of Douglas Lake, which has been confused 
with Rumex oris pus. 
3. Sisymbrium officinale (L.) Scop. The typical form, with pubescent 
pods. 
4. Rub us idaeus L. Tn the specimens collected, the sepals are softly 
and closely velvety, entirely lacking the hispid pubescence or prickles 
of the commoner variety aeuleatissinius. 
5. Oenothera muricata L. The species is at once distinguished from 
Oenothera biennis by the red hairs with conspicuously enlarged bases. 
It is common in the aspen association, especially near the shore of the 
lake. 
6. Circaea intermedia Ehrh. In deep moist woods, such as the sides 
of the “gorge.” 
7. Teucrium Occident ale Gray, var. bar calc (Bicknell) Fernald. Tn 
gravelly soil under thickets near the northwest end of Burt Lake. The 
general character of the pubescence is strongly suggestive of T. 
caniadcnsc, but the two are distinguished by the shape of the calyx 
teeth. 
