ref Bulbous Genus 'BRODIAEA' in Alliaceae

Lee Poulsen
Sun, 13 Apr 2008 23:44:05 PDT
FYI, here are the groupings/relationships in Themidaceae that were found 
using several different DNA sequences. It turns out that they are not 
even closely related to Alliaceae, but rather are a sister family to 
Hyacinthaceae. I tried to show the groupings and levels using '|' and 
'-' and indentation. I hope it makes sense. (It looks best when viewed 
with a fixed width font.) I got this from "A Phylogenetic Evaluation of 
a Biosystematic Framework: _Brodiaea_ and Related Petaloid Monocots 
(Themidaceae)" by J. Chris Pires and Kenneth J. Sytsma in American 
Journal of Botany 89(8): 1342-1359, 2002.

They found four major clades or high-level groupings:
The Brodiaea-Dichelostemma-Triteleiopsis clade
The Milla complex clade (sometimes called the Mexican Themidaceae)
The Triteleia-Bloomeria-Muilla clevelandii clade
The Androstephium-Muilla clade

The first two clades are related to each other more than they are to the 
second two clades, and the second two clades are more related to each 
other than they are to the first two clades.

Below you can see that there are two Brodiaeas and one Dichelostemma 
that are not as closely related to the other Brodiaeas and 
Dichelostemmas as all those are to each other.

Also the Triteleias aren't very closely related to the Brodiaeas or 
Dichelostemmas. All the Milla complex are more closely related to them 
than the Triteleias are. It turns out that the Triteleias are most 
closely related to the Bloomerias and Muilla clevelandii, and that those 
three are more closely related to the remaining Muillas and 
Androstephiums than to either the Milla/Mexican complex or the Brodiaeas 
or Dichelostemmas.

Very interesting. Of course this may get more refined far into the 
future as more and more DNA material is sequenced and compared.

--Lee Poulsen
Pasadena, California, USDA Zone 10a


|||||Brodiaea appendiculata
|||||  B. stellaris
|||||    B. minor
|||||    B. terrestris ssp terrestris
|||||B. jolonensis
|||||  B. elegans ssp elegans
|||||  B. cornaria ssp rosea
|||||Dichelostemma volubile
|||||  D. ida-maia
|||||    D. multiflorum
|||||    D. congestum
||||Brodiaea orcutti
||||B. filifolia
|||Dichelostemma capitatum ssp capitatum
|Triteleiopsis palmerii

|Dandya thadhowardii
|  Jaimehintonia gypsophila
|    Milla magnifica
|    Petronymphe decora
|Milla biflora
|  Bessera tuitensis
|  B. elegans


||Muilla clevelandii
||  Bloomeria humilis
||  B. crocea var crocea
||    Triteleia bridgesii
||      T. laxa
||      T. peduncularis
||    T. lemmoniae
||    T. montana
||      T. ixioides ssp scabra
||      T. hyacinthina
||        T. grandiflora var grandiflora
||          T. crocea ssp crocea
||            T. hendersonii var leachiae
||            T. hendersonii var hendersonii
||Androstephium coeruleum
||A. breviflorum
||Muilla maritima
||  M. transmontana
||  M. coronata


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