COL. GRANT—BOTANY ОҒ THE 5РЕКЕ AND GRANT EXPEDITION. 88 
5. PENTAS PURPUREA, Oliv., sp. nov. теста e basi lignosa ; caule subtereti, hispidulo- 
hirtello ; foliis lineari-lanceolatis, acutis v. obtusiusculis, inferioribus in petiolum brevem 
angustatis, superioribus subsessilibus, utrinque scabris v. inferioribus glabratis, læviusculis; 
stipulis 3- (pluri-)partitis, lobis subulatis ; суша terminali sessili, subglobosa; floribus 
subsessilibus ; calyce glabro v. pilis paucis brevibus hirto, lobis inæqualibus, lineari-subu- 
latis v. longioribus linearibus, acutis ; corollæ tubo inconspicue dilatato, lobis calycis lon- 
gioribus sepius longiore, lobis ovato-lanceolatis; staminibus inclusis. 
Caulis 1-12 ped. Folia 4 poll. longa, 3-1 poll. lata. Сута terminalis, subglobosa, bibracteata, pollicem 
diametro. Floribus purpureis. Calyx lobis 1-1 poll. longis. Corolla extus parce puberula, lobis ovato- 
lanceolatis. 4nthere lineares, inclusæ. 
Hab. Usui, 2° AU 8. lat. (Vignaldia no. 2, App. Speke's Journ. 636), in flower, Nov. 
1801, Col. Grant ! ; 
[12 to 18 inches high, with rough round stem. Root long and fibrous, stuck firmly in the ground. 
Leaves rough. Flowers of a deep purple colour; the pistil purple at its tip. Seeds small and numerous. 
On the Usui slopes of rock, November 1861.—J. A. G.] 
Col. Grant also collected at Zanzibar another Pentas, perhaps a form of P. carnea, Benth. The flowers, 
however, are smaller than in the usual state of that species, and it may probably fall under one of the 
critical species described by Klotzsch in Peters’s Mossamb. Bot. 286, under the genus Pentanisia. Pen- 
tanisia no. 1, App. Speke's Journ. 636, is an Asclepiad. 
6. ОтомквтА MADIENSIS, Oliv., sp. nov. Suffrutex decumbens; ramis foliiferis, ad- 
scendentibus, hirtello-scabridis; foliis oblongo- v. ovato- v. lanceolato-ellipticis, subacutis, 
basi in petiolum angustatis, utrinque pilosulis v. pagina superiore glabrata, inferiore 
precipue secus nervos scabrido-hirtella ; stipulis vaginantibus, laciniis anguste linearibus, 
setulosis ; spicis terminalibus, solitariis elongatisque vel paniculatis ; floribus subsessilibus, 
secus rachin primum confertis, demum fasciculatim v. singulatim alternis, calycis tubo 
turbinato-campanulato, lobo antico lineari-lanceolato, cæteris tubo (8-4-ріо) longiore 
valide costato ; corollz tubo gracili, cylindrico, quam calyce multo longiore, lobis oblongo- 
ellipticis ; staminibus breviter exsertis. | | 
Rami foliiferi, subteretes v. obsolete tetragoni. Folia 3-5 poll. longa, 4-21 poll. lata; petiolus plus 
minus alatus, brevis vel ad 2 poll. longus. Spice interdum pedales, rigidiuscule. Pedicelli calycis tubo 
subæquilongi, егесі, rhachi appressi. Calyx strigulosus v. glabratus, tubo (fructifero) valide costato, 
lobo ut videtur antico cæteris majore 1-1 poll. longo, lobis 4 brevioribus, ovato- у. lineari-lanceolatis, 
acutis, tubo æquilongis v. eodem longioribus. Corolla 3-1 poll. longa, tubo gracili, glabro, intus fauce 
pilosula. 
Hab. Madi (No. 691), Dee. 1862, Col. Grant ! 
[Rare plant, growing on bare ground near surface-rocks, Madi, December. А foot high; but a con- 
siderable part of the plant is decumbent. Тһе leaves are peculiarly marked with rust-coloured spots, ribs 
large underneath. Тһе flowers spire up the erect stem, which is roundly four-cornered, four-grooved, 
and covered with hair. Тһе sepals are а brown-green colour; and the outermost one is double the length 
of the other four. The corolla-tube and beneath the petals are bright pink in colour; but the upper 
surface of the petals is white. Five stamina are seen outside the flower, and have very short filaments. 
Тһе pistil is a quarter of the way down the length of the tube. Тһе flowers and stalks seem much 
eaten away.—J. А. С.) 
Plate XLVII. fig. 1. Flower; fig. 2. Corolla, laid open; fig. 3. Calyx and pistil; fig. 4. 
Transverse section of ovary ; fig. 5. Fruit advanced towards maturity. 
