1919] Fernald,— Arenaria 5 
seeds estrophiolate, and it does not require great experience with 
the seeds of Moehringia to assure any investigator that the strophiole 
is readily deciduous and therefore likely not to be found at all on the 
ripe seeds. The American Moehringia lateriflora (L.) Fenzl is a 
member of this genus in habit, disk, and seeds, but unfortunately 
for the constancy of the genus, as long ago pointed out by Asa Gray, 
the ovary is “plainly divided in M. lateriflora into as many cells as 
there are styles by manifest dissepiments: STYLES 3....sometimes 
2 or 4.”1 In other words, although a Moehringia in everything else, 
M. lateriflora is a Merckia in its 3-celled ovary! 
It would be easy to point out in our North American flora many 
other species which in one character or another break down the differ- 
ences which have been relied upon to separate as genera Arenaria, 
Minuartia, Ammodenia, Moehringia and Merckia, but the above 
notes should suffice to demonstrate that these are not true genera 
but are, rather, freely confluent subgenera of the single genus Arenaria. 
In organizing the material of Arenaria in the Gray Herbarium it has 
been found necessary to make the following nomenclatorial changes. 
ARENARIA arenarioides (Crantz), n. comb. Stellaria Arenaria L. 
Sp. Pl. 1196 (1753). Cerastium arenarioides Crantz, Inst. ii. 402 
(1766). Ar. cerastioides Poir. Voy. Barb. ii. 166 (1789). Ar. spathu- 
lata Desf. Fl. Atlant. i. 358 (1798). 
ARENARIA bryophylla, n. nom. Ar. musciformis Edgew. & Hook. 
f. in Hook. f. Fl. Brit. Ind. i. 237 (1872), not Triana & Planch. Ann. 
Sci. Nat. ser. 4, xvii. 150 (1862). 
Edgeworth & Hooker ascribe their A. musciformis to Wallich, Cat. 
no. 6401 as does also Index Kewensis; but Wallich’s no. 6401 is a 
Buddleia and at best the names in Wallich's Catalogue are nomina 
nuda. 
ARENARIA Funkii (Jord.), n. comb. Alsine Funkii Jord. Pugill. 
36 (1852). 
ARENARIA cymifera (Rouy & Fouc.), n. comb. Alsine cymifera 
Rouy & Fouc. Fl. Fr. iii. 275 (1896). 
ARENARIA iberica, n. nom. Minuartia dichotoma L. Sp. Pl. 89 
(1753), not Ar. dichotoma Krock, Fl. Sil. ii. pt. 1, 55 (1793). 
ARENARIA caucasica (Boiss.), n. comb. Alsine caucasica Boiss. 
Diagn. ser. 2, fasc. 1, 87 (1853), not Ar. caucasica Adams ex Ledeb. 
1 Gray, Gen. ii. 35 (1849). 
