52 XCVIII. ACANTHACEE (CLARKE). | Mellera, 
segments united half their length. Corolla-tube 4 in, long; lower 
lip } in. long, with 3 lobes. Anther-cells spurred at the base. Style 
hairy. 
Mozamb. Dist. Nyasaland ; Lufua, Descamps. 
Lindau says capsule unknown, and does not mention the ovules, but says he has no 
doubt about the genus of this plant. The corolla appears small for Mellera. 
11. PAULOWILHELMIA, Hochst. ; Benth. et Hook. f. Gen. 
Pl. ii. 1079. 
Calyx deeply divided into 5 subequal linear segments. Corolla 1-3 
in. long ; tube linear, or (in sect. Heteradelphia) inflated in the upper 
part; lobes 5, contorted in the bud, subequal, all to one side in the 
typical species. Stamens 4, subsimilar; anther-cells 2, not spurred ; 
pollen long ellipsoid, ribbed lengthwise. Style with one linear-oblong 
branch, the other very short or 0 ; ovary with 8 or more ovules, glabrous. 
Capsule cylindric, usually perfecting 6-16 seeds. Seeds nearly glabrous 
on the faces; margin with very many hygroscopic hairs.—Shrubs. 
Leaves long-petioled, ovate, irregularly (often coarsely) toothed. 
Flowers in scorpioid axillary lax cymes, running into a quasl- 
terminal panicle; bract ovate, deciduous ; bracteoles small or 0. 
Species 5, endemic in Tropical Africa. 
* Tyrica. Corolla-tube linear almost to the small mouth ; 
lobes 5, subreflexed, all on one side. (The 4 species 
here recorded have been estimated but one by a com- 
petent botanist.) 
Capsule seed-bearing from the base, nsually perfecting 
more than 4 seeds. Calyx segments united 4 the 
way up. 
Calyx 4 in. long ; capsule 4-4 in. long . . . 1. P. polysperma. 
Calyx more than # in. long; capsule 2 in. long . . 2. P. togoensis. 
Capsmle usually perfecting 4 seeds, contracted at the base. 
-_ 
alyx divided nearly to the base, glandular 3. P. Selerochiton. 
Calyx-segments united } the way up . 4. P. speciosa. 
** HeTeRADELPHIA, _Corolla-tube gradually widened 
upwards into an oblique mouth. Nerves of leaves 
prominent ; corolla-tube 2 in. long. . . . 5. P. nobilis. 
1. P. polysperma, Benth. in Hook: Niger Fl. 479. Stems glabrate. 
Leaves 2-5 in. long, ovate, truncate or subcordate at the base, irregu- 
larly toothed or lobed, sparsely pubescent or nearly glabrate ; petioles 
1-24 in. long. Cymes 1-2} in. long, lax, divided, subscorpioid ; bract 
and bracteoles deciduous. Calyx-segments } in. long, united more than 
} their length, sparsely hispid without, hairy within, cystoliths pro- 
minent. Corolla purple (Cummins) ; tube 1} in. long, linear, hardly 
dilated even at the top ; lobes } in. long, elliptic, all on one side, mauve. 
Capsule $~-% in. long, usually perfecting 8 (or more) seeds from the 
base.—Lindau in Engl. & Prantl, Pflanzenf. iv. 3B. 301. P. glabra, 
Lindau in Eng). Jahrb. xxii. 115. 
