44 contkiih;tions from the national herbarium, 



duplo majore ob\a^a; paloa inferiore 5-nervi apice potissiinum et in mesonervo promi- 

 lunte seabra, secua niurginem erube.^cente, apice longe iiincronata; palea superiore 



augusta breviore ludontata. 



"Absque loco (Liebin. n. 517).'' 



Thif^ ppecies is unkuown to us. 



Festuca tolucensis IL P>. K. 



Fesiaca toJucen,sl< II. B. K., together with its Hiipposed synonyms F. muUiculmis 

 Steud., and F, acqulpalada Fourn., belong to a group of Mexican species that we are 

 unable to clear up with the evidence and material at hand. Tlic group differs froui 

 other :\Iexican speciey by tlie leaves poHsesyinghirge ligulen and the palea being bifid. 

 The species are allied to F, thurberi Vasey, but differ hi the biii<l palea an<l awned 



lonniia. 



The foUowing are the original descriptions: 



Fedaca tolucensis 11. H, K. Nov. Gen, <fe Sp. 1: 153. 1815, 



'*F. cuhnis, vaginis foliisque scabris, setat^eo-triquetri^; panicuha sinipHci, laxa^ 

 ranus alternis, rhaehiiiue scabris; sspiculis obovato-oblungis, com])resfiiJS, subsexfloris; 

 ghuni>! paleisque scabris; arista brevi. 



'^Crcscit In monfo^h^ Rropulosi.^^ aprkis vegni Mextmni^ inter Mahaaca et Toluca, alt. 



1380 hexap, 2/ Fi'urt SiptembrK 



^' Radix fibrosa, Cuhni caespitosi, erecti, bipedales, simplices, striati, scabriusculi. 

 Folia convoluto-setacea, triquetra, apice subulata, scal)ra. Vaginae stnatae, carinatae, 

 scabrae. Ligula ovata, ol^tusa, ghibra. Fanicula simplex, laxa, qnadri- aut quin- 

 qnepollicaris, raniis alternis, adscendenti-patulis, triquetris, scabris, distantibus. 

 Rhaehis triqui^tra, scabra, Spiculae obovato-oblongae, qninque- aut sexflorae, flori- 

 bus distantibus. Gluniaeovato-lanceolatae, at-uniinato-subulatae, (^aruiatae, purpur- 

 ast'cntes, scabrae, inaequales, inferior diniidio ))revior et angustior, ^^uperior spicula 

 diuiidio brevior. Taleae lanceolatae, puriuirascentes, scal)rae, ai>ice bidentatae, 

 inferior superiore pauUo longior, inter dentes l)reviter aristata, superior bicarinata.'' 



Fedu('aimiltlruhuts^{B\\i\. Syn. TI. dram. 310. 1854. 



'*Radice validule fibrosa, caespitifcra, caespitibus constantibus e phiriniis cnh-nis 

 sterilil)UH fohifornii convulutis rigidis basi vaginalis et fuliiferis cuhnuni fertileni 

 (solitarium, an semper) aeqnantibus; vaginis striatis foliis brevibus convolutis; culuii 

 floriferi foliis inferiorilnis steriUbus siiuilibus, superiorilmsphiniusculisangustissimis; 

 vaginis scabriuscnlis; pnnicula simplicn (2-3-polUeari) laxa; radiis soH^ariis alternis 

 inferioribus 3-superioril.)us uni-spiculatis; sj)iculis ovatis patulis hixis (3 ^^^et ultra 

 longis) sub-5-floris glumis inaequalilius flosculis hrevioribus; valvula inferiore scabra 

 fu:Hco puri>urea infra lutescenti-albida obscure nervosa simphciter acuminata vel ex 

 apice brevissiiiie hidentula aristuhita. An I-', tolucensis II. \i. var.? Heller Ilrbr. 

 nr. 306. Mons Tolucco Mexico.'' 



Fesluca aeqv}pnleaia Fourn. ^lex. PI. 2: 125. 1881 



'*Differca F. Tolucen.^i foliis retrorsum scabris, paleis aequalibus, niferiore brevi- 

 ter mucronata, superiore profuTule bifida. 



^'In monte Orizabensi, 14,000^ (Liehm. n. 511, 513)." 



In the National llerburium are two sheets of specimens from Fournier, one of no. 

 511, Liebnumn, the type of F. aeqwpnlmfn Fourn., the other no. 510, Liebmaun, 

 referred by Fournier to /•: tolnren.v<i II. B. K. Doth of these sheets are mixtures, 

 each containing apparently two spe< ies, representing in all thre(^ species, or else 

 three tonus of' one varia)>le species. The specimens all agree in having large ligules 

 awned lemmas, and Indentale paleae, but differ in the form of the panicle, the size of 

 the spikeiets, and the ehapeof the Ihjrets. To com])licale matters still more the 

 remaining sheets examined all differ more nr less, while retaining the essential char- 



