GRASSES OF GRONOVIUS 's FLORA VIRGINICA. 127 



Holcus striatus L. Sp. PI. 1048. 1753. 



The type specimen is a Gronovius plant numbered 590, upon which Linnaeus has 

 written "7 striatus." It is Sacciolepis striata (L.) Nash (Panicum gibbum Ell.). 

 Clayton no. 590 in the Gronovius herbarium is the same. 



Apluda zeugites L. Syst. Nat. ed. 10. 2: 1306. 1759. 



The type specimen is from "Br." It is Zeugites americana Willd., which, however, 

 must be called Senites zeugites (L.) Nash in litt. Senites Adans. replaces 

 Zeugites R. Br., which is a hyponym. 



Cenchrus echinatus L. Sp. PI. 1050. 1753. 



The type specimen, which belongs to this species as usually understood, is marked 

 by Linnaeus "echinatus" without indication as to its origin. Following a number of 

 other synonyms Linnaeus a cites Sloane, page 108. The habitat given by Linnaeus is 

 "Jamaica, Curassao." 



Cenchrus tribuloides L. Sp. PL 1050. 1753. 



The type specimen, from "K," is the large-burred species of the Atlantic coast 

 which has been called C. macrocephalus (Doell) Scribn. and to which the Linnaean 

 diagnosis " C. glumis semineis globosis muricato-spinosis hirsutis" and habitat "in 

 Virginiae maritimis"- better apply than to the inland plant that has been going under 

 the name tribuloides. The inland species must be called C. carolinianus Walt. The 

 Gronovian specimen (Clayton no. 206) is the same as the Linnaean. Sloane's plate 65, 

 figure 1, is cited by Linnaeus. & Sloane's specimen is C. carolinianus Walt. 



THE GRASSES OF GRONOVITJS'S FLORA VIRGINICA. 



The herbarium of Gronovius is incorporated in the general her- 

 barium of the British Museum of Natural History. The specimens 

 upon which Gronovius based his description in his Flora Virginica 

 were collected in Virginia by John Clayton. Each sheet usually 

 bears a diagnosis and the Clayton number, both of which are given 

 by Gronovius, thus connecting the Clayton specimens with the species 

 described in the Flora Virginica. The species are given below in the 

 sequence in which they occur in the first edition of Gronovius's Flora 

 Virginica (part 1," 1739; part 2, 1743), the diagnoses being quoted 

 from that work. Many of these polynomials are cited by Linnaeus 

 as synonyms under his own species in the first edition of the Species 

 Plantarum and are referred to in the discussion of the corresponding 

 Linnaean species, in a preceding portion of this article. 



Panicum paniculatum floribus muticis. Gron. Fl. Virg. 1: 1739. 



Clayton, no. 381. No specimen was found. I am unable to identify this plant. 

 Gronovius cites also Pluk. Aim. 176. t. 92. f. 7. This appears to be a Panicum resem- 

 bling P. clandestinum L., but it can not be certainly identified from the figure. This 

 species of Gronovius is not cited by Linnaeus. 



Panicum panicula capillari erecta, foliis pilosis. Gron. Fl. Virg. 1: 13. 1739. 

 Clayton, no. 454. The specimen is Panicum capillare L., of which it is the type. 



Poa spiculis ovatis oblongis nitidis, panicula diffusa. Gron. Fl. Virg. 1: 13, 1739. 

 Clayton, no. 273. This is cited by Linnaeus under Poa flava, of which it is the type. 

 The specimen is Tridens flava (L.) Hitchc. (Triodea cuprea Jacq.). 



a Also Sp. PL ed. 2. 1488. 1762. 



&Sp. PL 1050. 1753 and ed. 2. 1489 1762. 



