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puberula; tubus 0-8 cm. long., 0-1 cm. lat., faucibus lsvissime 

 amplificatis; labium posticum 0-22 x 0-2 cm., lobi deltoidei, acuti, 

 circa 0-07 cm. long.; labium anticum 0-35 cm. long., circa 0-25 cm. 

 lat., usque medium lobatum. Pollinis grana circa 20 diam., 

 ambitu sphserica vel subspheerica faciebus parum elevatis. Ovarium 



valvas submembrai vix 0-5 cm. long, (vel minor), 



gracilis, pars seminifera vix 0-4 cm. long., acumen aspermum. 

 Semina 0-12 x 0-17 cm., margine haud incrassata, albida. Reti- 

 nacula recta, linearia, obtusa, basi tumida, circa 0-1 cm. long. 



The specimens have but few corollas, and such as I have 

 examined being by no means in good condition, it has been found 

 impossible to make a quite complete analysis. Though very small 

 irregularities may occasionally be made out upon the exine, the 

 pollen-grains are usually quite smooth, and not even with chloral 



parable with that of Wktifieldia and Stylarihropus as figured by 

 Lindau* — genera far removed from HomilacantJnis. On the other 

 hand, Perixt raphe, Hypo'estes and neighbouring genera have the 

 so called " Spangenpollen," characterised by six narrow and three 

 broader stripes or bands with a broad connection at the poles, and 

 three pores. But although the pollen of the two genera is so 

 unlike, those even who attach classificatory importance to pollen 

 would not, it is presumed, doubt the affinity of Horn ilac an thus with 

 Peristrophe, seeing that smooth pollen occurs in several undoubtedly 

 distant genera, such as Mm-h,, , < ; ,/. ,„,, ,,/ithus, Gatesia, and 

 Macrostegia. The lenticular shape of the pollen, as seen in an edge- 

 wise view, reminds one somewhat of the pollen of ThouHtmlernin, 

 but there are essential differences. 



Thunbergia (§ Euthunbeegia) Gregorii, sp. nov. Caule 

 scandente longe ac patente ferrugineo-hispido, foliis ovatis apice 

 mucronatis basi angulis 

 utrinque vel latere uno s 



subintegris petiolis alatis folia semiajquantibui 

 insidentibus, floribus majusculis axillaribus solitarns iongipeauncu- 

 latis et revera pedunculis plerisque folia exeedentibus, bracteolis 

 saltern 3-0 cm. long, dorso carinatis, calyce insequaliter pluri- 

 dentato, corolla bracteolas bene excedente, staminibus didynamis, 

 antherarum loculis apice obtusis basi cristatis et calcaratis, stigmate 

 subsequaliter bilobo. 



Hab. Ad Kilungu in montibus Iveti, reg. Ukambani, legit el. 

 Dr. J. W. Gregory, 1893, men. Apr. fl. (v. s. in herb. Mus. Brit.). 



Caulis volubilis, in longitudinem striatus, summum 0-2 em. 

 diam. Petioli 1-8-3-5 cm. long., patnli deorsum vix alati, sub 

 lamina 0-2-0-25 cm. lat., utrinque hispiduli ; foliorum lamina 

 3-7-4-2 cm. long., basi 3-0-4-0 cm. medio 3-0-3-5 cm. lat., subtus 

 aliquanto decolor, utrinque appresse hirsutula, costis subtus promi- 

 nulis. Pedunculi 4-0-7-5 cm. long., patente 



* Engler's bot, Jahrb. xviii. 1893 (fig. 1a & 25). 



