Solidago bicolor var concolor

 

 

State Status * CT MA RI VT NH ME
P SH   P P P

 

 

 

Ecology: Dry open woods; sandy or rocky (often sweeter) soil
Blooming Period: August to September
Typical Height Range: 2' to 3'   (6 to 9 dm)
[Our plants are var hispida.]

 

 What to look for in the field: 
  The capitulescence is often long and narrow, with numerous short branchlets either at the top of the stem or growing from nodes along the stem.  Robust plants may have a much broader, open capitulescence, with several longer, straight, ascending branchesHeads are crowded on branches, NOT in one-sided arrays.
  Stems are straight and densely pubescent, sometimes rough to the touch.
  Leaves are basally-disposed.  Basal and lower-most stem leaves are obovate, shallowly toothed, have long winged petioles, and may be present during flowering.  Mid- to upper stem leaves quickly become reduced in size upward, more narrowly ovate or elliptic, untoothed, and have shorter winged petioles or lack petioles (upper-most).
  Both ray and disc florets are bright yellow.
Note:  Solidago hispida is very similar to S. bicolor in many ways, with the obvious major difference being the ray and disc floret colors.  Indeed, S. hispida has often been considered a variation of S. bicolor ("var concolor" or "yellow bicolor").  Though infrequent, S. bicolor may have yellow ray and disc florets.  The color, however, is more of a pale yellow than the deeper, richer yellow of S. hispida.  Also, the phyllaries of S. hispida are pale yellow or green, with a somewhat indistinct green patch near the tip.  The green patch is more distinct in S.bicolor.  These two characteristics are the best way to distinguish the two species from each other.

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* State status data obtained from the NatureServe website and from published state natural heritage data.  Click link for a list of state status codes.

 

 

 

 

 

 

11/16/2009