list of figures - Terry Sunderland

longitudinally splitting and tattering post anthesis; flower cluster partially covered by
a tubular 2-keeled prophyll and consisting of 5, 7, 9 or 11 flowers arranged in a group;
1-3 pistillate flowers in the centre subtended by 2 lateral cincinni of 0-2 pistillate and
2-4 staminate flowers, each flower, apart from the central pistillate, bearing an open,
spathulate, 2-keeled, prophyllar bracteole. Staminate flowers symmetrical; calyx
membranous, striate basally, stalked, tubular, with 3, short, triangular, apiculate lobes;
corolla enclosed or only slightly exceeding the calyx, divided almost to the base into
3, elongate, striate, valvate petals; stamens 6, filaments united to form a thick fleshy,
androecial tube, free from the corolla, tipped with 6 shallow lobes, bearing pendulous,
rounded, latrorse anthers on the inside; pollen elliptic, monosulcate, with scabrate,
tectate exine; pistillode very narrow, conical, slightly exceeding the androecial tube.
Pistillate flowers superficially very similar to the staminate except slightly broader;
calyx and corolla similar; staminodial tube bearing tiny empty anthers; gynoecium
tricarpellate, triovulate, ± ellipsoidal, covered in reflexed scales, style long, narrow, 3angled;
ovule basally attached, anatropous. Fruit ± spherical, stigmatic remains
minute, conical; epicarp covered in vertical rows of rather thin reflexed scales,
mesocarp very thin, almost obsolescent at maturity, endocarp not differentiated. Seed
single, ± rounded, smooth or warty, basally attached with an oval hilum, covered with
a thin, papery, sweet sarcotesta; endosperm homogenous, laterally penetrated by a
smooth-margined mass of inner seed coat; embryo lateral opposite the intrusion.
Germination adjacent-ligular; eophyll bifid, petiole of seedling dull reddish pink.
Distribution
Oncocalamus has a distinct Guinea-Congolian distribution and ranges from SE
Nigeria to northern Angola, predominantly in coastal forest.
Notes
Recent collections have provided considerable insight into the life history and
morphology of this intriguing genus. Although recent literature has stated that
Oncocalamus is represented by only one, very variable, species, O. mannii, there are
in fact four species present in Africa. A new species, O. tuleyi, previously assigned to
O. mannii, is also described.
130