74. COL. GRANT—BOTANY ОҒ THE 5РЕКЕ AND GRANT EXPEDITION. 
subtus pallidis ; floribus 5-meris, terminalibus, solitariis geminisve, sessilibus; bracteis 
involueratis; calyce glabro v. basi setoso, lobis ovato-lanceolatis, patentibus v. recurvis, 
tubo multo brevioribus ; antheris subconformibus, in 5 majoribus connectivo infra loculos 
product, appendice earnosa bilobata, lobis obtusis ; capsula calyce breviora.— Tristemma, 
sp., App. Speke's Journ. 635. 
Folia 3-5 poll. longa, 14-2} poll. lata; petiolus 3-14 poll. longus. Involucrum bracteis exterioribus 
foliaceis. Calyx levis, tubo oblongo-campanulato, 1-4 poll. longo ; lobi $ poll. longi. Petala non vidi. 
Hab. Madi, flower and fruit, Dec. 1862, Col. Grant! 
(This is an uncommon plant, found only at Madi, in the bed of а burn, in December, when it was in 
seed. Seeds small, round, and red. Тһе leaves are very deep green above and paler beneath, with three 
prominent ribs; if rubbed reversely they feel like a file, being rough like the square stem.—J. А. G.] 
Plate XL. А. fig. 1. Portion of leaf, showing the adnate setæ; fig. 2. Flower, petals 
and all the stamens but two removed; fig. 8. Calyx-tube cut vertically, showing the 
capsule. 
LyTHRACEÆ. 
1. LAWSONIA ALBA, Lam.; Hiern, in Oliv. Fl. Trop. Afr. ii. 483. 
Hab. Banks of Nile, Philæ, Col. Grant! From Senegambia eastward to India. 
[This * Henna? plant was not observed till reaching 24° N. lat., at Philæ, upon the Nile, where it was 
in flower and fruit in May.—J. A. G.] 
2. МЕЗЉА CORDATA, Hiern, in Oliv. Fl. Trop. Afr. ii. 475. Herba erecta, annua, 1-2 
ped. alt., glabra у. scabrula; caule basi simplici 4-angulari; foliis sessilibus, oppositis, 
ovatis v. superioribus lanceolatis, basi cordatis, acutis, glabris v. pilosulis; floribus capitatis, 
capitulis circiter 5-floris involucratis, pedunculatis, breviter racemosis ; bracteis 2 cordatis 
vel late ovatis, bracteolis minutis linearibus, tubo calycis subæquilongis; calyce cam- 
panulato, membranaceo, margine breviter 4—6-deltoideolobato, dentibus isomeris, erectis, 
subulato-linearibus, lobis alternantibus.—N. erecta, App. Speke's Journ. 634. 
. Caulis basin versus sepius defoliatus, glaber v. glabratus. Folia 1-1 poll.longa. Pedunculi axillares, 
folium subæquantes. Involucrum 3 poll. latum, bracteis duabus cymbiformibus, oppositis, divaricatis, 
glabris v. pilosulis. Ovarium sessile, 2-loculare. des 
Hab. Madi, in advanced flower, Dec. 1869, Col. Grant! Found also in Nigritania | 
and Angola. 
Plate XL. B. fig. 1. Capitulum and bracts; fig. 2. Single flower and pair of bracteoles; 
fig. 3. Flower laid open; fig. 4. Petal; fig. 5. Transverse section of ovary ; fig. 6. Capsule; 
fig. 7. Vertical section of same; fig. 8. Seed. ` 
[Diminutive plant in the swampy ground at Madi, October 1862.—J. A. G.] 
3. ÅMMANNIA SENEGALENSIS, Lam.; Hiern, in Oliv. Fl. Trop. Afr. ii. 477.—4. vesi- 
catoria, App. Speke's Јошт. 634; var. 8. patens, Hiern, 1. с. Annua v. biennis, 1-2- 
pedalis ; ramulis foliisque patentibus ; eymis multifloris, densis, subsessilibus ; staminibus 
4, brevibus ; ovario 2-loculari. 
Нађ. Madi, 8 1 i i i 
Je ower and fruit, Dec. 1862, Col. Grant! Widely spread in Tropical 
[This is one of those plants which grow in the mud accumulated 
was in flower in December.—J. А. G.] upon surface-rocks at Madi, where it 
