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ALEXANDER W. EVANS 
crenulate. The underleaves with their lanceolate divisions resemble 
somewhat those of L. pililoha Spruce and L. spiniloha Lindenb. & 
Gottsche, but they agree even better with those of Microlejeunea 
laetevirens (Mont. & Nees) Evans on account of the fact that they 
are sometimes unidentate on the sides. 
4. Rectolejeunea Maxonii Evans 
Rectolejeunea Maxonii Evans, Bull. Torrey Club 39: 609. pL 45, 
/. 17-27- 1912. 
On bark of trees. Florida: Gainesville, March, 1916, N. L. T. 
Nelson 7g, gz; Robinson's Spring, eight miles south of Sanford, April, 
1917, S. Rapp 87. Alabama: Auburn, September, 1900, F. E. Lloyd 
&f F. S. Earle. Porto Rico: Mount Morales, near Utuado, March, 
1906, M. A. Howe 4S3. The species was based on the following 
specimens, collected in 1903, at Cinchona, Jamaica: L. M. Under- 
wood 4g5; W. R. Maxon 1361 (type); A. W. Evans 14J in part. No 
other stations are at present known. 
The specimens from Florida and Alabama bear numerous female 
inflorescence but show neither perianths nor androecia. Since they 
are slightly smaller than the original material of R. Maxonii from 
Jamaica, it at first seemed unwarranted to refer them definitely to 
that species. The specimens from Porto Rico, however, bridge over 
the gap. Most of them are no larger than the plants from the United 
States, while others equal the Jamaican plants in size. In other 
respects the specimens from the different localities show an essential 
agreement. In all probability the range of R. Maxonii will be still 
further extended, now that its characteristics are more accurately 
understood. 
In the original account of the species vegetative reproduction by 
means of caducous leaves was described but was reported as a rare 
phenomenon. The Florida specimens show that this is by no means 
the case. The majority of the stems examined have produced cadu- 
cous leaves in abundance, and some of them have become almost 
leafless. In most instances plants of this character are sterile, but 
an occasional archegonium is produced, the bracts remaining firmly 
attached. When archegonia are abundant, the tendency to form 
caducous leaves is much less evident and seems to become completely 
inactive in plants with perianths. When the species was first pro- 
posed as new the lobes of the vegetative leaves were said to measure 
