AMERICAN GRASSES DESCRIBED BY LINN2EUS. 125 



we have been calling Zizania aquatica. The description of Z. aquatica as given by 

 'Linnaeus is very short, "panicula effusa," and would apply to either form. He prob- 

 ably did not then distinguish between the -two. Both synonyms refer to the broad- 

 leaved form and the habitat given is Jamaica and Virginia, where the narrow-leaved 

 form is not known to occur. However, it seems evident that the only plant that Lin- 

 naeus saw was" the narrow-leaved form. His description was short because he thought 

 there was but one species. The fact that later he described the broad-leaved form as 

 a distinct species confirms the opinion that his idea of Z. aquatica was the narrow- 

 leaved species. Consequently we must call the narrow-leaved species Zizania aquatica 

 . L. and the broad-leaved species Z. palustris L. 



Pharus latifolius L. Syst. Nat. ed. 10. 2: 1269. 1759. 



The type specimen is from "Br," and is the common Jamaican species. Lin- 

 naeus/ 1 following his own diagnosis, cites Sloane's plate 73, figure 2, which is the same. 



Andropogon divaricatum L. Sp. PI. 1045. 1753. 



The type specimen is marked "2 divaricatum" and is from Gronovius. As pointed 

 out elsewhere, b this is the same as A. alopecuroides L. , which is an Erianthus. It should 

 be called Erianthus divaricatus (L.) instead of Erianthus alopecuroides (L.) Ell. 

 Linnaeus also cites a synonym from Gronovius which is based on Clayton no. 600. 

 This is Sorghastrum linnaeanum (Hack.) Nash.. 



Andropogon nutans L. Sp. PI. 1045. 1753. 



The type specimen is marked "3 K nutans." It agrees with Linnaeus 's diagnosis 

 and is Sorghastrum nutans (L.) Nash, as described in Small's Flora. The panicle is 

 rather compact and the awn bent once. On the back of the sheet is a reference to 

 Gronovius, "Lagurus Clayton 600," but, as indicated above, that is S. linnaeanum 

 (L.) Nash. Linnaeus cited two synonyms of his Andropogon nutans, one from Grono- 

 vius based on Clayton no. 621, which is Stipa avenacea L., and one from Sloane (plate 

 14, figure 2), which is Valota insularis (L.) Chase (Andropogon insulare L.; Panicum 

 leucophaeum H. B. K.). 



Andropogon alopecuroides L. Sp. PL 1045. 1753. 



The type specimen is a Gronovian plant and bears Clayton's number 601. The 



"corresponding specimen of Gronovius's herbarium is the same, Erianthus alopecuroides 



(L.) Ell., but should be called E. divaricatus, as indicated above in the discussion of 



Andtopogon divaricatum L. Linnaeus here c also cites Sloane's plate 70, figure 1, 



which is Imperata caudata Trin. 



Andropogon virginicum L. Sp. PL 1046. 1753. 



The type specimen is marked "7 virginicum," but without indication as to its 

 origin. It belongs to this species as usually understood. Gronovius's specimen 

 (Clayton no. 460) is the same. A second sheet in the herbarium from "Br." is A. 

 leucostachys H. B. K. Linnaeus^ cites Sloane's plate 68, figure 2, which is Andropogon 

 leucostachys H. B. K. 



Andropogon bicorne L. Sp. PL 1046. 1753. 



The type specimen marked by Linnaeus belongs to the West Indian species known 

 by this name. A second sheet with a Gronovius label and numbered 602 is A. sco- 

 parius Michx. The diagnosis of Gronovius, based on this latter specimen, is cited by 

 Linnaeus under A. hirtum, an Old World plant, but not under A. bicorne. Clayton 

 no. 602 in the Gronovius herbarium is also A. scoparius Michx. The Gronovian 

 synonym given by Linnaeus under A. bicorne is supported by a plant in the Gronovian 

 herbarium (Clayton no. 606) which is Andropogon glorneratus (Walt.) B. S. P. Lin- 

 naeus 6 cites Sloane, page 42, and later /cites his plate 15. 



« Also Sp. PI. ed. 2. 1408. 1762. d Sp. PL ed. 2. 1482. 1762. 



&Bot. Gaz. 35: 215. 1903. «Sp. PL 1046. 1753. 



cAlso Sp. PL ed. 2. 1481. 1762. /Sp. PL ed. 2. 1482. 1762. 



