120 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Agrostis indica L. Sp. Pl. 65. 1753. 
The type specimen from “ Br,” is Sporobolus indicus (.) R. Br. Linnzeus@ cites as 
a synonym, Sloane, Hist. Jam. 1: 115. pl. 73. f. 1. This also is Sporobolus indicus, 
Linneus cites the same plate under Poa ciliaris. 
Agrostis radiata L. Syst. Nat. ed. 10. 2: 872. 1759. 
The specimen in the Linnean herbarium from “ Br?’ is Chloris radiata (L.) Sw. as 
described in Grisebach’s Flora. Chloris radiata (1.) Sw. Prod. 26. 1788, is based on 
Agrostis radiata LL. Swartz’s specimen is also this species. After his own description 
in the Systema Linnzeus cites Sloane’s plate 68, figure 3, but does not use his diagnosis, 
hence the Linnean plant is the type. Sloane's plant is Chloris eleusinoides Griseb. 
Agrostis cruciata L.. Syst. Nat. ed. 10. 2: 872. 1759. 
The specimen is from “ Br.’? Linnzeus cites Sloane’s plate 69, figure 1 after his own 
description, but does not use his diagnosis, hence Browne’s plant in the Linnean her- 
barium is the type. This and Sloane’s plant are Chloris cruciata (L.) Sw., as generally 
understood. 
Aira spicata L. Sp. Pl. 64. 1753. 
All the species of Aira of Linnzeus are based upen Old World material. Linneeus 
inadvertently gave the specific name spicata to two species of Aira in the same publi- 
cation, The first is on page 63. He discovered this error and in the errata, volume 2, 
changed the name of the first to indica. In the tenth edition of the Systema Naturae 
he described the first species under the name 1. ¢ndica and the second he changed to 
A. subspicata, thus eliminating the name spicata altogether. In the Species Plan- 
tarum, ed, 2, 1762, the name spicata is retained for the second, probably inadvertently. 
The two specimens in the herbarium show evidence of these changes. The first sheet, 
which is Panicum indicum, shows the word Aira with a line drawn through, Panicum 
written in front, and the final “a’’ of the specific name changed to “wm. The 
second sheet, which is Trisetium subspicatum (L.) Beauv., shows that ‘sib’? has been 
later prefixed to “spicata.”’ The specimen of this is pubescent like Avena mollis 
Michx. ( Trisetuum molle (Michx.) Kunth.) Some authors have restricted the Linnsean 
name to the glabrous form and used Michaux’s name for the pubescent form, either as 
a species or a subspecies. It the two forms are considered distinct, the glabrous form 
must receive a different name. . 
As Linneeus corrected the name of the first Aira spicata to Aira indica in his list. of 
errata, the latter name is valid for that species. The second Aira spicata is also valid 
and the name of the species is Trisetum spicatum (L.) Richter, Plant. Europ. 1: 59, 
1890 (7. subspicatum (L.) Beauy.; 7. molle (Michx.) Kunth.) 
Aira aquatica L. Sp. Pl. 64. 1753 (Catabrosa aquatica (..) Beauv.), A. caespitosa L, 
loc. cit. (Deschampsia caespitosa (.) Beauv.), and A. fleruosa L. op. cit. 65 (Des- 
champsia fleruosa (L.) Trin.) appear to be identical with our North American forms. 
Poa flava L. Sp. Pl. 68. 1753. 
sased on “Gron. virg. 13.’’ Gronovius’s specimen, Clayton no. 273, which is the 
type, is Triodia euprea Jacq.¢ 1 do not consider this species congenerie with Triodia 
R. Br. Beauvois based his genus Tricuspis upon this species, changing@ Poa cacru- 
lescens Michx. (a herbarium name for this species) to Tricuspis caroliniana. But on 
account of Tricuspis Pers. 1807, Roemer and Schultes changed the name of the genus 
to Tridens, citing Beauvois’s figure. The type species is Tridens quinguifida (Poa 
quinguifida Pursh, which is the same as Poa flava L.). Wenee the name becomes 
Tridens flava (1..) Witche. Rhodora 8: 210. 1906, 
a@ Sp. Pl. 63. 175: 
I 
nd ed. 2.94. 1762. e Ch. Bot. Gaz. 88: 297. 1904. 
bSp. PL. ed. 2. 2. 
same 
02. 176 @ Agrost. 77. pl. 15. f. 10. 1812. 
