Types of Androecium in the Fabaceae of SW ... - Annals of Botany

Rodrıguez-Rian o et al.—Androecium in Fabaceae 111
Table 1. (cont.)
Taxa Nectar Androecium Taxa Nectar Androecium
Ononis L.
O. biflora Desf. M
O. broterana DC. M
O. cintrana Brot. M
O. diffusa Ten. M
O. laxiflora Desf. M
O. natrix L.
O. pendula subsp. boissieri (S irj.) Devesa
M
M
O. pinnata Brot. M
O. pubescens L. M
O. reclinata subsp. mollis (Savi) Be guinot M
O. reclinata L. subsp. reclinata M
O. spinosa subsp. australis
(S irj.) Greauter & Burdet
M
O. iscosa subsp. brachycarpa (DC.) M
Batt.
O. iscosa subsp. crotalarioides
(Cosson) S irj.
Tribe Genisteae
Genista L.
M
G. anglica L. M
G. cinerascens Lange M
G. falcata Brot. M
G. florida L. M
G. hirsuta Vahl M
G. polyanthos subsp. hystrix (Lange) M
Franco
G. tournefortii Spach M
G. triacanthos Brot. M
G. tridentata L. M
G. umbellata (L’He r.) Poiret
Retama Rafin.
M
R. monosperma (L.) Boiss. wd M
R. sphaerocarpa (L.) Boiss.
Spartium L.
M
S. junceum L.
Echinospartum (Spach) Rothm.
M
E. barnadesii subsp. dorsisericeum M
G. Lo pez
Ulex L.
U. eriocladus C. Vicioso M
U. minor Roth
Cytisus L.
M
C. arboreus subsp. baeticus (Webb) M
Maire
C. balansae subsp. europaeus M
(G. Lo pez & Jarvis) Mun oz Garmendia
C. grandiflorus (Brot.) DC. M
C. multiflorus (L’He r) Sweet M
C. scoparius (L.) Link M
C. striatus (Hill) Rothm. M
M, Monadelphous androecium; Pm(), pseudomonadelphous without basal fenestration; Pm() S, pseudomonadelphous with basal
fenestration (stamen A1 superposed); Pm()F, pseudomonadelphous with basal fenestration (stamen A1 fused); D, diadelphous; Dr, reduced
diadelphous; F, free.
* Potentially nectariferous taxa; wd, without data.
Whatever the type of androecium, the fusion of the
stamens in this family confers an important adaptive
advantage (Polhill et al., 1981) by forming the staminal
column and limiting the range of pollinators that can work
the flower. Many instances of fusion are specifically
associated with pollination mechanisms, probably as the
result of coevolution, although it is not known whether they
are correlated (Tucker, 1987).
Adenocarpus DC.
A. complicatus subsp. anisochilus
(Boiss.) Franco
M
A. complicatus (L.) Gay subsp.
M
complicatus
A. hispanicus subsp. argyrophyllus
Rivas Goday
M
A. hispanicus subsp. gredensis
Rivas Martınez & Belmonte
M
A. telonensis Loisel.
Argyrolobium Ecklon & Zeyher
M
A. zanonii (Turra) P. W. Ball
Lupinus L.
M
L. albus L. M
L. angustifolius L. M
L. hispanicus subsp. bicolor Merino M
L. hispanicus Boiss. & Reuter
subsp. hispanicus
M
L. luteus L. M
L. micranthus Guss.
Tribe Galegeae
Galega L.
M
G. officinalis L.
Biserrula L.
M
B. pelecinus L.*
Colutea L.
Dr
C. atlantica Browicz
Astragalus L.
D
A. cymbicarpos Brot. D
A. echinatus Murray D
A. epiglottis L. subsp. epiglottis* Dr
A. glaux L. D
A. glyciphyllos L. D
A. hamosus L.* D
A. lusitanicus Lam. D
A. nitidiflorus Jime nez & Pau D
A. stella Gouan*
Tribe Psoraleae
Cullen Medik.
D
C. americanum (L.) Rydb.
Bituminaria Fabr.
Pm()F
B. bituminosa (L.) Stirton
Tribe Thermopsideae
Anagyris L.
Pm()F
A. foetida L.
Tribe Robinieae
Robinia L.
F
R. pseudacacia L. Pm()F
Also of interest in flower biology is the type of reward
offered to pollen vectors. Many members of this family offer
nectar which is secreted in the innermost parts of the base of
the staminal filaments and accumulates in the space created
between the stamens and the pistil (Bonnier, 1879; Mu ller,
1883). Access to the nectar is by way of the space created by
one of the ten stamens which originates two entrances at its
base, so that in principle one might think that only species