(345) SGHINZ. BEITR/EGE ZUR KENNTNIS DER AFRIKANISCHEN FLORA. 547 



Ipomœa citrina Hallier f. 



Frutex erectus, ad /. Holubii Baker et /. verbascoideam (Choisy?) 

 Hallier f. (/. Elliottii Baker; /. dammaranam Rendle) proxime accedens, 

 bractearurn forma alque textura posteriori preecipue similis, cinereo- 

 lomentosus; rami stricti, inferne ramulis abbreviatis dense tuberculati, 

 juniores teretes, tenuiores, pilis brevibus simplicibus subulatis semimal- 

 pighiaceis cellulse basali oblique affixis prope basin la lere uno inflatis 

 densissimis cinereo-tomentosi, superne foliosi et florentes, seniores 

 robustiores, glabrati. livescentes, cortice rimoso irregulariter rugoso- 

 angulati, aphylli; petioli pedunculique longi, tenues, teretes, tomen- 

 tosi; foliorum lamina mediocris, orbiculari-cordata, obtusa vel sube- 

 marginata, mucronata, integerrima, herbacea, pinninervis, supra flaves- 

 cenli-sericea, subtus tomento denso albido-cinereo vestita; pedunculi 

 axillares, solitarii, stricti, biflori; bracteee binae, magnae, circa calyces 

 involucrum formantes, Iateorbiculari-spalhulalse, obtusse. breviter ungui- 

 culatae, basi Calystegiœ süvaticds et dahuricae more cucullatas, folia- 

 ceo-membranacese, intus glabrae, lu lese, nervoso-lineataB et venoso-reli- 

 culatae, extus albido-lomentosse, seniores lutescentes, diu persistentes; 

 floris lateralis bracteolse 2 una cum bracteis ad dichotomiam insertse, 

 bracteis similes, sed multo minores et angustiores, obovato-spathulatse; 

 pedicelli brèves, ceterum pedunculo similes; sepala 5 bracteis forma, 

 textura, indumento, colore simillima, sed non unguiculata nee cucullata, 

 latissima, si expansa, eadem fere forma, qua petala Papaveris, seseinvol- 

 ventia, interiora gradatim minora; corolla mediocris, late tubuloso- 

 infundibularis, lsete citrina; fascia3 o mesopelate nervis 2 conspieuis 

 a segmentis commissuralibus distincte limitatse et prseterea nervo uno 

 mediano conspicuo nervisque multis ienuioribus lineatse, extus albido- 

 pilosulee, apice sericantes; stamina 5 insequalia, 2 longiora stylum adas- 

 quantia, quam corolla dimidio breviora ; antherse longaa, lineares, sub- 

 cordatae; pollen ut in lpomœis, globosus, undique porosus et acute 

 spinosus; discus subeupularis; ovarium longum, fusiforme, glabrum; 

 Stylus integer, glaber; Stigmata 2 parva, globosa. 



Rami juniores vix 2 mm, seniores usque 6 mm crassi, internodiis 

 1-3 cm longis; petiolus 1-4 cm longus; folii lamina usque 4 cm longa 

 et 35 mm lata; pedunculi usque 3 cm longi; bratese ca. 17 mm 

 longae et totidem latse; bracteolce ca. 11 mm longse, 7 mm latse; 

 pedicellus terminalis 5 mm longus; sepalum extimum ca. 14 mm 

 longum, 18mm latum; corolla ca. 35 mm longa, 2 cm lata; filamenla 

 longiora ca. 15 mm longa; antherœs 4 mm long33. 



Somali-land, Laku (Prof. Dr. Keller 1891 no. 235, Hb. Tur.). 



