MEMOIRES DE l'hERBIER BOISSIER. (6) 



EMBRYOPHYTA. 



GRAM^A. 



HACKEL (St-Pölten). 



Eleusine somalensis HACK. 



Annua? Culmus, ut videtur, prostratus, ramosus, ad nodos interdum 

 radicans, leres, glaberrimus. Folia e papillis patenti-pilosa : vaginaB ple- 

 rumque propter ramos patulos a culmo solulse, ligula brevis, membra- 

 nacea, truncata ; laminse lanceolato-lineares, acuminatae, cire. 5 — 8 cm Ig., 

 3 — 4 mm lt., margine scabree, planée, flaccidulse. Spicae in apice culmi 

 ramorumque ssepius binse, sibi approximafee (interstitio cire. 1 cm longo), 

 late ovatœ, vel rotundatse 1 — 1,5 cmlg,, a culmo divergentes, rhachi sub- 

 trigona, glabra, cum spicula terminali. Spiculœ dense imbricatse, sessiles, 

 ovatse, 5 — 7-flores, 7 mm Ig., pallide virides demum substraminese ; 

 glumse steriles totam spiculam sequantes v. subsuperantes, ovato-lanceo- 

 latsß, subulato-acuminatae, acumine rigido subpungente, rigide membra- 

 nacese, glabrse, multinerves (nervis 5 crassioribus et ssepius 6 tenuioribus 

 percursse); glumse fertiles latissime ovatse, in acumen brève pungens 

 subito contractas, rigide membranacese, S — nerves, carina in 73 inferiore 

 breviter ciliata. Palea gluma sua paullo brevior, ovata, acuminata, carinis 

 valde curvalis alalis glabris. 



Somal-Land : Webi-Habir (Kellerj. 



Species glumis sterilibus muHinerviis ab omnibus congeneribus dis- 

 tinctissima, fere subgenus proprium habenda. 



Andropogon (sect. Schizachyrium) Kelleri HACK. 



Culmus prostratus ramosissimus, ramis ramulisque erectis plus minus 

 dense fasciculatis cire. 10 cm longis. Folia glaberrima : vaginse arctse, 

 internodia culmi subaîquantes, ramorum autem valde superantes ibique 

 arcte imbricatse ita ut folia fasciculos densos efforment. Ligula obsoleta, 

 marginiformis. Laminse lineares, planse a basi sensim angustatae, tenui- 

 acuminatse, erecto-patulae, glabrescentes, etiam margine Iseves, tenui- 



