TRIANDRI A-DIGYNIA . 407 



ovato-lanceolatse , concava; , acuminatae , aut acutae , a 

 linea dimidia ad sesquilineam longae , caiinatse , cari- 

 na viridi , aut tota , aut superne ciliato-scabra , raro 

 nuda , lateribus glabris , aut sub fortiori lente miiiu- 

 tissime puberulis , viridi-pallentibus , aut albido-pur- 

 purantibus . Ghima corollina bivalvis , membranacea , 

 mutica, glabra, initio albo-viridula, demum dealbata. 

 Valva exterior calyce qviidquam brevior, oblonga, con- 

 cava, quinqueuervis , obtusa , atque a nervis produ- 

 ctis plus minns maniieste denticuLata , dentibus sub- 

 inde brevissime setaceis, saltem uno alterove, et prse- 

 sertim medio . Interdum qnoque nervus medius hujus 

 valvae paulo intra apicem ejus sejungitur ab illa , et 

 abit in setulam brevem, scabram, nullimode articula- 

 tam , prout aristae Agrostidum est . Penicillus brevis- 

 simus pilorura vitrinque unus ad basim bujus valvse 

 prope ejus marginem . Valva corollina interior dimidio 

 brevior , angustior , binervis , apice bidentata . Garyo- 

 psis libera . 



Varietas ^ differt tantum , quia flosculi aristati sunt in- 

 termixti flosculis muticis, scilicet gluma corollina major 

 interdum ex dorso paulo supra basim emittit aristam 

 articulatam, infra articulum contortam, superius sca- 

 bram , ipsa valva circiter duplo longiorem, arefactione 

 refractam . 



Varietas ^ fit vivipara , corollis in bulbillos elongatis , 

 extra calycem productis . 



Varietas / nunc pumila culmo digitali, nunc plusquam 

 pedalis , qui lusus subinde babentur in eodera csespi- 

 te . Garyopsis ejus corrumpitur ustilagine , et fit tur- 

 gidula, nitida, mucronulata, at semper intra calycem 

 continetur . 



Nullura dubiura est , Agrostldem alham L. esse levissi- 

 mura lusura Agrostidis vulgaris Smitb. , ut jam innui 

 in Amoen. Ital. p. a. 3. , ad quas lectorera nunc ara- 

 mando . In earadera sententiam nuperrime ivit etiam 

 Linkius in Hort. rog. Berol. descript. i. p.78., et in il- 

 lam pronus videtur Hookerus , cura ait : / know not 

 of any British awlness Agrostides , ivhich may not he 

 reduced either to A. vulgaris or A. alba. The two spe- 

 cies are indeed very closely united Brit. Fl. p. 84. Quod 

 si Smitbiiis pro speciebus diversis retinet : / concur 

 ivith Prof. Hooker ond 3I.r Bicheno in uniting A. sto- 

 lonifera io A. alba, hut hy no menns in percei-ving 

 any amhiguity hetvoecn the latter and vidgaris Engl. 



