106 Rhodora (JUNE 
EXPLANATION OF PLATE 75. 
Fig. 1. Pleurotaenium coronatum (Bréb.) Rabenh., x 351. 
Fig. 2. » truncatum (Bréb.) Nig. (after W. & G. S. West) 
X 310. 
Fig. 3. - Ehrenbergii (Bréb.) DeBary, X 350 
Fig. 4. " Trabecula (Ehrenb.) Nig., X 350. 
Fig. 5. " subgeorgicum Cushman, x 350. 
Fig. 6. " constrictum (Bail.) Lund., X 350. 
Fig. 7. s nodosum (Bail) Lund., x 350. 
Fig. 8. A verrucosum (Bail. Lund., x 350. 
STREPTOPUS OREOPOLUS A POSSIBLE HYBRID.—- In April, 1906, I 
described from the alpine region of Mt. Albert, Gaspé Co., Quebec, 
as Streptopus oreopolus! a plant which in some ways combined char- 
acteristics of S. amplexifolius and S. roseus, but in its deep claret- 
colored perianth was unlike either. The original description was 
based upon simple or subsimple alpine specimens, and at that time 
the plant was known only from a limited area on Mt. Albert. 
During the summer of 1906, however, Professor J. Franklin Collins 
and the writer found Streptopus oreopolus in company with S. am- 
plexifolius and S. roseus abundant along alpine brooks on the northern 
hornblende slopes of Mt. Albert, and in extreme abundance every- 
where on alpine meadows and in the open park-like subalpine forests 
of the granitic tableland of Table-top Mountain. In fact, on Table- 
top Mountain S. oreopolus impresses one as perhaps the most abun- 
dant plant of the cool slopes and alpine meadows, always more abun- 
dant than S. roseus and S. amplexifolius, maintaining its slightly 
ciliate-hispid stems and leaves (pronouncedly less ciliate than in S. 
roseus) and its attractive flowers, in form and structure like those of 
S. amplexifolius but always a deep claret-purple in color. 
Since the fruit of this local plant of the Gaspé mountains was still 
unknown we took special interest in examining daily, through our 
four weeks’ residence in the alpine areas, the colonies of Streptopus. 
The result of a very close observation of the plants over an area of 
about one hundred square miles was that, while both S. roseus and S. 
amplexifolius were found to mature abundant fruit, not a single plant 
of S. oreopolus could be found with even a vestige of good fruit. In 
1 Ruopora, viii, 70 (1906). 
