BOTANY. 
clxxxix 
60. Festuca beevifolia, racemo subsimplici erecto, flosculis teretlbus supra scabrlusculis 
arista duplo longiorlbus, foliis setaceis vagiaisque Isevibus : culmeo supremo multoties breviore 
vagina sua laxiuscula. 
Obs. Facies et statura fere F. ovinse inter quam et F. Halleri media; priori forsan nimis 
affinis. 
61. Festuca vivipaea. 
Obs. NuUam observationem habeo de exemplari unico Festuca cujusdam viviparse olim 
viso in herbario D. Sabine, ulterius examinando. 
PLEUROPOGON. 
Chae. Gen. Locustcs multiflorse, cylindraceas. Gluma abbreviata, insequivalvis, mutica. 
Perianthii valvula inferior mutica, obtusa, concava, nervosa, apice scarioso : su-perior 
nervo utroque lateraliter biseto ! Lodiculce distinct®. Styli 2. Stigmata plumosa. Caryopsis 
libera, laterlbns compressis. 
Gramen elegans. Foba plana, angusta, vagina integra, ipso apice tantum- fisso. Ra- 
cemus simplex, locustis cernuis, purpureis, nitentibus. Gluma valvula inferior e acuta, 
superiore latiore obtusa. Perianthia distincta, valvula inferiore 5-1-nervi, superiore 
lanceolata emarginata, pari superiore setarum brevissimo. 
Obs. Genus Glycerise proximum, quacum locustis teretibus, perianthiis obtusissimis et 
vaginis foliorum integris convenit ; differt prsesertim setis lateralibus nervorum valvulfe supe- 
rioris perianthii, lodiculis distinctis, stigmatibus baud decompositis, caryopside lateraliter 
compressa et inflorescentia. 
Character fere essentialis in nervis valvulse superioris perianthii latere setigeris ; analoga 
structura enim vix, quantum scio, in ullo alio gramine obtinet nisi in Uniola latifolia Mick, am., 
ubi equidem nuUis ahis differentiis comitata pro charactere specifico tantum habenda. 
62. PLEUROPOGON SABINII— Tab. D. 
Desc. Gramen 3-unciale usque spithameum, glabrum. Culmi erecti, foliati, striati, laeves, 
simplices. Folia radicalia angustiora, longiora ; cuhnea linearia, plana, brevia, laevia : va- 
ginae paulo compress®, striat®, glabr®, l®ves, fere ad apicem integr®, ipso apice fisso, mar- 
ginibus scariosis, suprema folio proprio longior : ligula brevissima, rotundata, emarginata. 
Spica racemosa, simplicissima, radii striato-angulata, l®vi, viridi, pedunculis lateralibus giu- 
mam vix superantibus, recurvis, l®vibus, indivisis, altevnis, distantibus. LocustcB subcylin- 
drace®, cernu® v. pendul®, semunciales, purpure®, nitid®, per lentem tenuissime pubescentes. 
Gluma bivalvis, nana, in®quahs, membranacea, purpurea, mutica; valvula inferiore ovata, 
