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NEW URTICACHA FROM TROPICAL AFRICA 997 
EXPLANATION OF PLAT 
Fig. 1. Trematodon brevisetus (type) 5 ; a, pla se nat. size; b, capsule, x 4; 
upper cells, x 200.—Fig. 2. Mic campylopus 3 subnanus (Nu wara Eliya, 
Binstead); a, spores, x 200.—Fig. 3. Fissidens aberrans (type); a, a, sterile stem, 
i 0.—Fig. 4. imi 
upper, —Fig. amp 
chate thamnioides veal m, nat. size; b, branches, x 10; c, leaf, x 20; 
d, leaf apex, x 40; es ale x 200; f, Basal sine gies 200.—Fig. 7. 
Acanthocladium ceytonense ype); a, stem, nat. size; b, b', leaves, x 20; c, pie 
cells, x 200; d, capsule, x 8; e, apex of pericheetial ay x 40. Tig. 8 . Taxithe- 
pi Binsteadii yeaa ; a, stem, nat. size; b, b', leaves, x 20; c, upper cells, x 
200; d, alar we x 200.—Fig. 9. Taxithelium —o. (i ype) ; a, stem, 
nat. size; pee Apes alar cells, X 100,—Fig. 10. Vesicularia caloblasta 
(type); a, upper sp x 200. 
NEW URTICACEH FROM TROPICAL AFRICA. 
By Dr. A. B. Renpte, F.R.S. 
In elaborating the group of families comprised in the aggre- 
gate Urticacee of Bentham and Hooker for the Flora of ee 
Africa, I hav 4 ted, mainly in the herbaria at Kew an 
British nig a fe forms. In order to conform ‘ oe 
International Rules of Nomenclature, it is necessary to publish 
Latin diagnoses, and, with the concurrence of the Director of the 
Royal Gardens, these are submitted herewith, so far as concerns 
the genera at and Dorstenta. 
Celtis Tessmannii, sp. nov. Arbor ut apparet decidua, 
peo tena us hirtellis, ultimis ad 1:5 mm. crassis internodiis 
‘2— ongis. a breviter petiole in sicco tenuiter papy- 
racea, ‘oblong: elliptic minata, 
basi valde neequali, iets sibeatie ee 11 cm 
. lon nga, 2-4 ¢ 
lata, in fae superiore, nervo mediano breviter ‘hirtello excepto, 
glabra, in facie inferiore pilis Bcrbus albidis seabridula, in ner 
hirtella; nervis lateralibus utrin que 3-5, ascendentibus, iil 
veluti venulis prominulis; venga ad 2 mm. longus, hirtellus. 
Stipule anguste subulate, hirtelle, ad 4 mm. ae Sepala circa 
mm. longa, dorso pilosell Ovarvum ovoideum, dense pilosum, 
. West Tropical Africa. Hinterland of oS Guinea, 
Mabungo, at 450 m., Tessmann, B. 25! Her 
Near Celtis Zenkeri Engl., from which it is distinguished by 
the almost sessile unequal-sided leaves oy very slender stipules. 
Celtis insularis, sp. nov. Arbor eximia trunco recto et ligno 
albo (Welwitsch), ramulis tenuibus sayveatits glabris. Folia 
Flores haud vise. ae cilipasigae apice angustata, ¢ 
15 cm. longa, in sicco rugosa et pallide brunnea. 
