274 PROCEEDINGS OF THE AMERICAN ACADEMY. 
welcome, as much may thus be contributed to fulness and accu- 
racy in the final treatment of this group for the “ Synoptical Flora.” 
To the botanists, both professional and amateur, who have most kindly 
assisted the author in his work upon the present paper, he would 
express sincere appreciation and cordial thanks. To the following he 
is especially indebted: Professors William Trelease and N. L. Britton, 
r. J. H. Redfield, Mr. F. V. Coville, Dr. J. N. Rose, Mrs. T. S. 
Brandegee, Miss M. E. Carter, Professor J. Macoun and Mr. J. M. 
Macoun, Professors T. C. Porter, L. H. Pammel, W. W. Bailey, and 
O. D. Allen, Messrs. William M. Canby, John Donnell Smith, Walter 
Deane, Edward L. Rand, Theodor Holm, and J. F. Collins. In the 
study of Spergularia an extensive series of Californian forms of that 
difficult genus, contributed to the Gray Herbarium by Mrs. T. 5. 
Brandegee, has proved invaluable. In matters of synonymy and the 
citation of literature Dr. Watson’s Bibliographical Index has again 
been a most useful guide. 
CARYOPHYLLACEA, Trix I. SILENEZ. Including gen 
era 1-7. (See Proc. Am. Acad. xxviii. 124.) 
Tree II. ALSINEZ. Sepals free or slightly united at the 
very base. Petals more or less contracted but not unguiculate below. 
Corona absent. Flowers mostly small. Styles distinct to the base. 
* Stipules none. 
+ Capsule cylindric, more or less elongated, often curved, dehiscent by twice 
many teeth as there are carpels. ; 
8. Holosteum. Sepals 5. Petals 5, white, subentire or denticu- 
late toward the apex. Stamens 3-5, very rarely 10. Styles 3 (occa- 
sionally 4 or 5), longitudinally stigmatic. Pod unicellular. Seeds 
numerous, dorsally flattened, i. e. parallel with the incumbent cotyle- 
dons ; the radicle prominent upon the ventral surface. Inflorescence? 
umbelliform. 
9. Cerastium. Sepals in our species 5. Petals as many, retus? 
or bifid, very rarely subentire, white. Stamens 10, or sometimes 
fewer. Styles 5 (4 or 3). Capsule usually exceeding the calyx, often 
curved. Seeds numerous, more or less laterally compressed: 
+ + Capsule ovoid or oblong relatively short, dehiscent = as many OF twice 
as many teeth as there are ca 
ite 
- Styles usually fewer than the sepals, when of the same number oppo! 
them 
10. Stellaria. Sepals 5 (-4). Petals 5 5 (-4, rarely abortive °F 
é absent), always more or less deeply bifid, often divided almost to 
hi 
se, white. Stamens 3-10. Styles 3-4, rarely 5. 
