152 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Andropogon ambiguum Michx. 
“In sabulosis Carol.’’ The specimen is Gymnopogon ambiguus (Michx.) B.S. P. 
Branches floriferous from base. 
Chloris petraea Sw. 
‘‘Carolinis & Florida.’? The specimen belongs to this species. 
Chloris monostachya Michx. 
There is no plant with this name, but there is a good specimen which answers to the 
description labeled Chloris piperita, without locality, however. The published 
locality is, ‘in sylvis Carolinae inferioris.’”” Michaux states that the fresh plant has 2 
peppery taste. The specimen is Campulosus aromaticus (Walt.) Scribn. 
Chloris mucronata Michx. 
“Tn cultis Carolinae.’’ The specimen is Dactyloctenitum aeqyptium (1...) Willd. 
Chloris curtipendula Michx. 
“Tfauteurs du Missouri et Poste Vincenne.’’ The specimen is Bouwleloua curti- 
pendula (Michx.) Torr. as usually understood. 
Tripsacum dactyloides L. 
“T]linois, Basse Carolina.’’ The specimen is of this species. 
Tripsacum cylindricum Michx. 
“Tn florida.’’ The specimen is Manisuris cylindrica (Michx.) Kuntze (Rottboellia 
cylindrica (Michx.) Chapm. of our manuals). 
Rottboellia dimidiata L. 
No locality is given. The specimen is Stenotaphrum secundatum (Walt.) Kuntze. 
Cenchrus tribuloides L. 
No locality is given on the sheet but the specimen must have been collected along 
the seashore, for it has the large villous fruits characteristic of the true C. tribuloides 
L., which has been named C. macrocephalus (Doell) Scribn. and C. vaginatus Steud. 
The common inland form which has been going under the name of C. tribuloides 
should be called C. carolinianus Walt. 
Aira flexuosa L. 
“Connecticut.’”’ The specimen is Deschampsia fleruosa (1...) Trin. 
Aira ambigua Michx. 
“Riv. que tombent au Lac St. Jean.’ 
(L.) Beauv. 
) 
The specimen is Deschampsia caespitosa 
Aira melicoides Michx. 
‘“Canada.’? The specimen is Graphephorum melicoideum (Michx.) Beauv. as 
described in Britton’s Manual. 
Aira obtusata Michx. 
“Tn sabulosis Carolinae, Georgiae, Floridae [sign for perennial]. In Florida juxta 
domum Wiggin.’’ The specimen is Sphenopholis obtusata (Michx.) Scribn, (Hatonia 
obtusata (Michx.) Gray as described in our manuals). 
There are two individuals. One is slender, about a foot high, nearly glabrous 
throughout, with a narrow rather compact panicle; the other, more robust, but con- 
sisting only of panicle and upper leaf, is pubescent (under a lens) upon sheath and 
blade. This panicle, which is attached to a label with “herb. de M. de Pinckney 
11.2,” is lobed like the western form called S. obtusata lobata (Trin.) Scribn. The 
first specimen should be taken as the type, as it no doubt represents Michaux’s own 
collection from Florida. : 
Professor Scribner has pointed out@ that Eatonia of Rafinesque could not be the 
Eatonia of Endlicher and later authors, but he was not able to identify EKatonia Raf, 
@ Rhodora 8: 137. 1906. 
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