The flowering plants of Africa: An analytical key to the genera of African phanerogramsThonner, Franz
Science
The flowering plants of Africa: An analytical key to the genera of African phanerograms
Thonner, Franz
Angiosperms -- Africa; Plants -- Africa
34. Sepals densely hairy. Petals minute. Staminodes in the female
flowers present. Carpels hairy. (See 26.) _Triclisia_ Benth.
Sepals glabrous or scantily hairy. Staminodes in the female flowers
absent. (See 16.) =Tiliacora= Colebr.
SUBORDER MAGNOLIINEAE.
FAMILY 81. ANONACEAE.
Shrubs or trees. Leaves undivided, without stipules. Flowers usually
hermaphrodite. Sepals 3, rarely 2, usually valvate in the bud. Petals
3-6, free or united at the base. Stamens hypogynous, 6 or more, usually
numerous, rarely (_Bocagea_) 3. Anthers nearly always turned outwards.
Carpels 3 or more, separate, more rarely united and forming a one-or
many-celled ovary. Ovules inverted. Fruit usually a berry. Seeds with a
copious, ruminate albumen and a small embryo.--Genera 27, species 240.
(Plate 48.)
1. Carpels whorled and united, forming a 1-celled ovary with parietal
placentas. [Tribe MONODOREAE.] 2
Carpels spirally arranged, free, more rarely united, and then forming a
many-celled ovary. 3
2. Petals unequal, free or the outer united below, frequently with a
wavy margin.--Species 15. Tropics to Delagoa Bay. The seeds of some
species are used as condiments and in medicine. =Monodora= Dun.
Petals equal, more or less united below, not wavy at the
margin.--Species 15. Tropics. (Under _Monodora_ Dun.) =Isolona=
(Pierre) Engl.
3. Petals 6, the inner greatly exceeding the outer. Carpels 4-6, with
united stigmas; ovules 6-10 to each. Trees with long-haired branches.
Flowers in panicles.--Species 5. West Africa (Cameroons). [Tribe
MILIUSEAE.] =Piptostigma= Oliv.
Petals 6, about equal in length, or the inner shorter, or petals 3-4. 4
4. Petals thick, more or less distinctly jointed into an inferior
hollow portion and a superior flat or thickened one, erect or
connivent, rarely spreading, valvate in the bud, very rarely (_Anona_)
the inner imbricate at the apex. [Tribe XYLOPIEAE.] 5
Petals thin or rather thin, rarely thick, not jointed and usually
spreading, but sometimes hollow or with a short claw appressed to the
stamens. 10
5. Carpels united in fruit. Ovule 1. Styles oblong. Petals 3, alternate
with the sepals, or 6.--Species 10, six of them spontaneous in tropical
and South-east Africa, 4 cultivated in various regions. They yield
cork-wood, fibre, gum-lac, tans and dyes, poisons, medicaments, a
substitute for tea, and edible fruits (custard-apple, sour-sop, and
others) from which also drinks are prepared. (Plate 48.) [Subtribe
ANONINAE.] =Anona= L.
Carpels free till maturity. [Subtribe XYLOPIINAE.] 6
6. Ovules solitary. 7
Ovules 2 or more to each carpel. Petals 6. 8
7. Petals 3, opposite the sepals. Stigmas sessile. Trees with a yellow
bark and yellow hairs.--Species 3. Central Africa. They yield timber,
dyes, and medicaments. (Under _Xylopia_ L.) =Enantia= Oliv.
Petals 6, the outer greatly exceeding the inner. Stigmas borne upon
linear styles.--Species 6. Equatorial West Africa. (Under _Oxymitra_
Blume) =Stenanthera= (Oliv.) Engl. & Diels
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