au MÉMOIRE 8- 



Laggera Sch. Bip. 



Laggera Lecomteana 0. HofFm. et Muschler. 



Caulis erectus, simplex vel superne paniculato-ramosus, subgiaber vel 

 pilis parvis unicellularibus sparsitn obtectus, folia ovata vel oblongo-ovata 

 vel late lanceolata apicem caulis versus sensim decrescenlia, nervis pube- 

 ruJis exceptïs glabra, nigrescentia, margine evidenter dentuta, basalia 

 basin versus in petiolum perbrevem amplexicaulem angustata, caulina 

 sessilia amplexicaulia. Capitula majora longe pedicellata; involucri 

 squamae inferiores flores superantes lineares vel lineari-oblongœ, acutœ, 

 glabrae, flavido-aibidai, médiocres oblongse, intus flavœ extus brunneœ, 

 parce pilosœ, exteriores dimidium interiorum arquantes oblongo-ovatae, 

 fusco-brunneaî. Flores feminei multiseriali numerosi, coroUa tubulosi 

 filiformi apice 2-dentala, stigmatibus exsertis; flores hermapliroditi 

 femineos paullo superantes. Acbœnia pubescentia. 



Haut-Chari. — Bords du Mindja Zendéré, affluent du Bangoran, 



10 décembre 1905, n° 6713. Ndellé, 18-22 février 1903, n'^ 7579 

 [Aug. Chevaliei^], 



p 



Planta glabra, 0,5 m. alta. Folia inferiora iri petiolum brevem semiam- 

 plexicaulem angustata, ovata vel oblongo-ovata, 5-7 cm. longa, 3-4 cm. 

 lata, caulina sessilia, amplexicaulia. Capituli involucrum 2 cm. altum, 

 4 cm. latum. Gorollae 2 cm. longae. 



Laggera macrorrhiza 0. Hofim. et Muschler. 



Caulis e radice crasso herbaceus erectus vel adscendens pubescens vel 

 interdura villosus, paniculato-ramosus; folia late lanceolata, basalia 

 plerumque parce lyrata vel sinuato-dentata, basin versus sensim in 

 petiolum brevissimum angustata, caulina sessilia vel rarissime subsessilia, 

 margine intégra, repanda vel leviter dentata, utrinque albido-tomentosa, 

 nervis flavidis. Capitula longe pedicellata in corymbos paniculam amplam 

 laxam efformantes disposita; involucri squama; oblongae vel lineares, 

 acutœ, punctulata?, apice sublacerae; achsenia teretia, striata, glabra. 



Haut-Niger. — Goundindan,.Médinani, 28 février 1899, n'' o04. 

 Haut-Chari. — Ndellé, 24-27 février 1903, n-^ 7614 [Aug. Cheva- 

 lier] . 



r 



Sphaeranthus L. 

 Sphœranthus Lecomteanus 0. Hofîm. et Muschler. 



Herba erecla vitlosa, divaricato-ramosa. Caulis adscendens vel erectus, 

 teres, plus minus strialus, parte inferiore plerumque cicatricibus foliorum 

 delapsorum obtectus. Folia alterna, dentata, dentibus in mucronem 

 attenualis, in caulem decurrentia, basalia longe linearia, caulina 

 lanceolata vel lanceolato-obovala, suprema ovata, omnia acuta et in 

 mucronem attenuata, ut tota planta dense villosula. Capitula majuscula, 

 discoidea; involucri angusli squamœ paucae angustœ, acutœ, subpaleaceffi 

 parum inaequales, lineares; receptaculum parvum, nudum; corollae ^ 



