GRAMINE/E. Ischwmum. 205 



culo exteriore glumae sessdis bivnlfi, s.repu.squc masculo : 

 a Rottboellia gluma altera pedicello solnto insidente. Is- 

 ehaemo igitur affinis est Rottboellia digitata Fi'or. Grcec, 

 et diversa tantu.n peelicello juxta apicem articulato, squa- 

 misque hypogynis lobatis lacinula exteriove longiore. 

 Colladoa Cavcn. I. c. genuina species Ischaemi est, ut patet 

 ex figura, et descriptione mutatis uat tium nominibus. 



I. Spicce conjugatce, dimidiatie, ghima pedice.llata, liflora, 

 sessili utplurimum siniilis. 



1. I. triticeum, racheos angulis barbatis, glrmis iniberbibus 



laevibus : interioris carina supra alata, periamhii herma- 

 phroditi arisla exserta, tbliis lanceolatis, vaginis imis hir- 

 sutis, geniculis barbatis. (T.) v. v. 



Obs. Proximum I. mutfco L. in quo arista brevior subinchisa 

 et gehiculi culmi imberbes. Ab I. murino diftert statura 

 majore et geniculis barbatis. 



2. I.australe, racheos pedicellique angulis barbatis, glumis im- 



berbibus laevibus : interioris carina subsimplici, perianthii 

 hermaphroditi aiista inclusa brevissima, roliis vaginisque 

 glabris lsevibus, culmo erecto, geniculis barbatis. (y.) v. v. 



Obs. Nimis affine 1. mutico. L. 



3. I. villosum, racheos pedicellique augulis barbatis, gjumis 



laevibus : exteriore basi villo.sa, perianthii hcrmapliroditi 

 arista exserta, foliis scabris, vaginis laeviuus, cuhao crecto, 

 gcniculis barbatis. (T ) v. v. 



II. Spicce solitariie, simpiices, arittatce: gluma pedicellata, 

 l—2-flora, mascula v. ueulrd. 



4. l.fragile, spica tereti, racheos articulis pedieeliisque obn- 



vatis ventricosis intusconcavis membrauaque scariosutectis, 

 arista glumae inrerioris setacea brevi ; perianthii genicu- 

 lata elongata, foliis pubescentibus, geniculis barbatis. (T.) 

 B. v. s. 



5. I. laxum, spica subnutante, racheos pedicelHque angnlis bar- 



batis.glumis submembranaceis riervbsis glabris pedicellata 



biilora , flosculis mascuiis iauticis. (1.) v. v. 



III. Spicce siinpliccs, faiciculatce, muticco • gluma pedicellata, 

 ■niastula v. neuira. 



6. I. RollloeiUoides , spicis flliforriiibus glaberrimis laevibus al- 



ternatim 



