1918] Fernald,— Allies of Rynchospora macrostachya 139 
5-6 mm. long, 2.6-3 mm. broad; the tubercle 1.9-2.2 cm. long; and 
the 6 bristles mostly 1.1-1.4 mm. long. In Oakes’s variety the 
mature achenes are 4.2-4.8 mm. long, 2.2-2.6 mm. broad; the tuber- 
cle 1.5-1.7 cm. long; and the bristles 0.9-1.1 cm. long. It thus seems 
that the plant which is passing as R. macrostachya, var. inundata is 
clearly distinct from R. macrostachya and should be called 
Ryncuospora inundata (Oakes), n. comb. Ceratoschoenus macro- 
stachys, B. inundatus Oakes in Hovey’s Mag. vii. 185 (1841). R. 
macrostachya, var. inundata Fernald, Ruopora, viii. 164 (1906). 
When the present writer transferred Oakes’s variety to Rynchospora 
he identified with it Chapman’s Florida plant, which was originally 
described as Ceratoschoenus macrostachyus, var. patulus in 1860." 
This variety of Chapman’s is considered by Britton a variety of R. 
corniculata, with which Britton unites R. macrostachya, but it has 
characters which separate it very definitely from all three species. 
Like R. inundata, this Florida plant is loosely stonoliferous and has 
the diffuse inflorescences, which characters separate it at once from 
R. macrostachya; and its achene is much shorter than in’ the non- 
stoloniferous R. macrostachya but very much broader than in the 
stoloniferous R. inundata, while its tubercles and bristles are shorter 
than in either of those species. From R. corniculata, which the plant 
resembles, it is separated at once by its shorter achene, shorter tubercle 
and much longer bristles. This plant, of which there is a large amount 
of material in the Gray Herbarium, collected by Chapman and others 
in Florida, and some specimens from north to South Carolina, has the 
achenes 4.2-4.6 mm. long, 3-3.5 mm. broad, the tubercle 1-1.4 cm. 
long, and the usually 4 bristles 4.4-8 mm. long; typical R. corniculata, 
which abounds from Florida westward to Louisiana and extends north- 
ward to Delaware and Missouri, having the achenes 5-6 mm. long, 
2.8-3.3 mm. broad, the tubercle 1.5-1.8 mm. long, and the 5-7 very 
short bristles at most 34 mm. in length. Chapman’s plant seems, 
therefore, to be a definite species, but, in view of the fact that there 
are already species bearing the names R. patula and R. Chapmanit, 
another name is necessary for it. It is, therefore, a pleasure to com- 
memorate in the name of this species the discrimination of that prince 
of students of the Cyperaceae, John Carey, who marked upon one of 
the Chapman sheets in the Gray Herbarium “These specimens incline 
me to think that this is indeed a good species.” This species is then 
1 Chapman, Fl. 529 (1860). 
