220 
BOTANY OF THE UGANDA BOUNDARY COMMISSION. 
Flores *5 cm. long.  Sepalum dorsale 4'5 mm. long. ; 
sepala lateralia 5 mm. long. Petala circa 4 mm. long., 
vix 1 mm. lat. Labellum 4°5 mm. long., vix 4 mm. lat. 
Lobus medius, lobos laterales excedens, paullo plus quam 
2 mm. long. et lat. Columna vix plus quam 1 mm. long. 
Very near Polystachya fusiformis, but distinguished by the 
less diffuse panicle, and the larger flowers with tailed sepals. 
LrsrRosrACHYS vesicata, Reichb. f. in Flora, xlviii. (1865) 
190. 
Wood near Kabora river. Fl. February, 169. 
“ Flowers yellow." 
Distrib. Coast region of Bay of Guinea from Ashanti to 
Cameroons. 
MYSTACIDIUM UGANDENSE, sp. nov. 
Planta habitu M. vanthopollinii, caule elongato cum radici- 
bus, foliorum vaginas persistentes perforantibus, instructo; 
foliis linearibus, apice inequaliter bilobis ; racemis axil- 
laribus, folia subsequantibus, sublaxiter plurifloris (flores 
circa 10) ; bracteis ocreatis, obscure apieulatis; floribus 
brevissime pedicellatis ; sepalo dorsali elliptico-oblongo, 
breviter apieulato, cum nervo mediano valido, lateralibus 
oblongis vix apieulatis; petalis late ellipticis, obtusis, 
manifeste 5-nervibus ; labello flabelliforme, valde emar- 
ginato, margine edentula, venis numerosis radiantibus 
conspicue lineato, calcari anguste cylindrico recurvato, 
quam labello paullo lougiore: rostello rostrato, polliniorum 
stipitibus glandulisque geminis ut in genere. 
Hab. Ruchigga. Fl. November, 425 in part. 
Caulis 8-9 em. long., circa 4 mm. diam. Foliorum vagin» 
persistentes circa 8 mm. long. Folia circa 6 em. long., 
5-6 mm. lat. Bractez 2 mm. iong., pedicellus cum ovario 
vix 3 mm. long. Sepalum dorsale 4 mm. long., vix 
2 mm. lat.; sepala lateralia :quilonga sed paullo an- 
gustiora. Petala sepalis zequilonga 2:5 mm. lat. Labellum 
vix 6 mm. long. et paullo latior; calcar labello subæquans, 
l mm. diam. Columna vix 2 mm. long. 
L have carefully compared the flowers of this plant with 
flowers of the type of M. canthopollinium, collected by Welwitsch 
in Angola, and think that the Uganda plant certainly represents 
a distinct species. The parts of the flower in the Uganda plant 
are prominently veined and lack the copious pustulation of the 
