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
109. Flowering glumes with 3, sometimes very short awns. Spikelets
many-flowered. Spikes long, rather loose.--Species 4. Central Africa.
=Tripogon= Roth
Flowering glumes with one awn or mucro or unarmed. Spikes dense,
usually short. 110
110. Flowering glumes with a rather long awn, long-haired on the
back. Spikelets 2-3-flowered.--Species 6. Central and North Africa.
(Including _Lepidopironia_ Rich.) =Tetrapogon= Desf.
Flowering glumes unarmed or mucronate. 111
111. Spikes 2-3 together. Spikelets 3-4-flowered. Fruit almost
orbicular. Leaves rather broad.--Species 1. Egypt and Nubia. (Under
_Eragrostis_ Beauv.) =Coelachyrum= Nees
Spike solitary. Fruit oblong. Leaves narrow. 112
112. Spikelets 2-flowered. Flowering glumes and paleas delicately
membranous.--Species 3. South Africa. (_Prionanthium_ Desv.)
=Prionachne= Nees
Spikelets 3-to many-flowered. Flowering glumes and paleas firmly
membranous, rather stiff. 113
113. Outer glumes subequal.--Species 1. North-west Africa (Algeria).
=Wangenheimia= Moench
Outer glumes very unequal or only one present.--Species 50. Some are
used for the manufacture of paper or as ornamental or fodder-plants.
Fescue.” (Including _Ctenopsis_ De Not., _Nardurus_ Reichb., and
_Vulpia_ Gmel.) =Festuca= L.
114. (108.) Outer glumes 4. Spikelets falling entire. 115
Outer glumes 2, usually persisting on the stalk of the spikelet. 116
115. Outer glumes 1-nerved. Flowering glumes 5-nerved. Styles
short.--Species 1. South Africa. =Tetrachne= Nees
Outer glumes 3-8-nerved. Flowering glumes 7-11-nerved. Styles
long.--Species 2. South Africa and Angola. (Under _Tetrachne_ Nees).
=Entoplocamia= Stapf
116. Outer glumes shortly awned, much longer than the flowering
glumes. Spikes short, distant, at length bent downward.--Species 2.
Central Africa and Egypt. Used as ornamental grasses. (_Dineba_ Jacq.)
=Dinebra= Jacq.
Outer glumes unarmed or mucronate, shorter than the flowering glumes.
117
117. Spikelets very densely crowded. Spikes digitate, at least the
upper. 118
Spikelets not very densely crowded. Spikes distant. 119
118. Spikes ending in a point. Outer glumes mucronate.--Species 6. Used
as cereals, fodder-, medicinal, or ornamental plants, and for making
beer. (Under _Eleusine_ Gaertn.) =Dactyloctenium= Willd.
Spikes terminated by a spikelet. Outer glumes usually unarmed. Pericarp
usually loose.--Species 10. The coracan (_E. coracana_ Gaertn.) is
cultivated as a cereal and for the preparation of beer; other species
are used as medicinal or ornamental plants. (Including _Acrachne_ Wight
Arn.) =Eleusine= Gaertn.
119. Flowering glumes rounded on the back. Pericarp more or less
adhering to the palea. (See 113.) =Festuca= L.
Flowering glumes keeled. Pericarp free. 120
120. Glumes thinly membranous, the outer subequal. 121
Glumes firmly membranous, glabrous, the outer conspicuously unequal. 122
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