B28 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Mr. Hemsley enumerates in the Biologia 25 species from Mexico, 
while the number of species known today is about 40.9 Mr. Hemsley’s 
treatment was the old one, in which Oenothera was considered a 
polymorphic genus. The Mexican species have never been considered 
in the light of recent classification and for this reason the review was 
undertaken with considerable interest and I trust without prejudice. 
My judgment is that there are 8 genera in Mexico, although some may 
prefer to callthem only sections. Professor Léveillé does not believe 
in breaking up Oenothera, but since he has so wholly disregarded its 
natural groups his conclusions as to the generic limitations will have 
little weight. 
NEW HARTMANNIAS. 
Hartmannia berlandieri (Spach) Rose. 
Oenothera berlandieri Walp. Rep. 2: 85. 1843. 
Nylopleurum berlandieri Spach in Nouy. Ann. Mus. Par. 4: 370. 1836. 
The NXylopleurum berlandieri of Spach seems not to have been reported since that 
author’s time. There are, however, in the National Herbarium a number of sheets 
which have heretofore passed as Oenothera or Hartmannia tetraptera but which answer 
better to this species. As I have not yet seen Berlandier’s plant there is of course 
still some doubt whether my specimens are identical, but there is little question that 
Spach’s name deserves recognition under Hartmannia. 
Hartmannia cuprea (Schlecht. ) Rose. 
Oenothera cuprea Schlecht. Linnaea 12: 269. 1838, 
I have collected near the type locality of Oenothera cuprea Schlecht. a Hartmannia 
which I have referred here for want of a better place. My specimen (no, 5672) was 
growing as a weed in cultivated ground, which may account for its large size, 
Mr. Seaton’s plant (no. 212), also from Mount Orizaba (alt. 3,450 meters), is more 
typical. 
I have also referred here two specimens collected by the writer from the high 
mountains of Central Mexico, no. 5611 from Sierra de Pachuca, Hidalgo, July, 1901, 
and no. 5713 from Flor Maria, State of Mexico, July, 1901. 
Type locality: ‘In prato elatiore montis Orizaba.”’ 
Hartmannia dissecta (Gray) Rose. 
Oenothera dissecta Gray, in 8. Wats. Proce. Am. Acad, 1'7: 357. 1882, 
Megapterinm dissectum Small, Bull. Torr. Bot. Club 23: 184. 1896. 
Oenothera dissecta has clearly the fruit of a Hartmannia rather than a Megapterium, 
and I therefore have no hesitancy in transferring it to the former genus. 
We have the following material in the National Herbarium: 
San Luis Potosi: Near San Luis Potosi, Parry and Palmer, 1878 (no. 249); J. 
Barreta, no date. 
Durango; Near Durango City, Dr, KE. Palmer, 1896 (no, 966). 
Type locality: ‘In sandy localities near San Luis Potosi.”’ 
Hartmannia havardii (S. Wats.) Rose. 
Oenothera havardii S. Wats. Proc. Am. Acad. 20: 366. 1885. 
Doctor Small has recently referred this species, with Oenothera dissecta A. Gray, to 
Megapterium dissectum. The two species while similar in habit and foliage are evi- 
dently distinct. The former is distinguished especially by its very short style 
branches and its cohering calyx tips. 
Type locality: ‘‘On prairies near Morfa, western Texas.’’ Collected by Y. 
Havard. 
