> please what is the valid name of D. rechingeri???
_D.rechingeri_ STRID. ;-)
>If I understand well, D. coolamon is not a valid name
Correct.
>and the valid name is D. rechingeri that has white flowers.
Correct.
> D. citrina is the valid name (?) for the same plant with yellow flower.
^^^^
Incorrect: it is *NOT AT ALL* the same plant.
_D.rechingeri_ STRID is (as I am convinced) an isolated species, the
closest congener being _D.occidentalis_ (sharing clavate stigmas and rather
undivided stipules but with fewer flowers), not closely realted to the very
numerous splitoffs of _D.leucoblasta_ (with lanceolate to filiform stigmas,
and generally rather large flowers) which have been revived or established
recently by A.Lowrie.
_D.citrina_ is closer to _D.leucoblasta_. It is approximately as closely
(or remotely) related to _D.leucoblasta_ as _D.pycnoblasta_ or
_D.pulchella_. It is distinguished from all these by the characteristic
gemmae (with a warty vertex) in combination with filiform stigmas. The
flowers are sometimes white (this expression has been described as
_D.nivea_ in the meanwhile).
Kind regards
Jan