I mentioned last week that you could possibly find a rhododendron in bloom every day of the year in UBC Botanical Garden. I think (and others will surely correct me if I'm wrong) that the only genus of plants that you are guaranteed to find in flower every day of the year is Rosmarinus or the rosemarys.
The olfactory properties of Rosmarinus have a long-standing reputation for being memory stimulants. In “Aromas of rosemary and lavender essential oils differentially affect cognition and mood in healthy adults.” (Int. J. Neurosci. 2003 Jan;113(1):15-38), Moss et al. found evidence that partly supports this assertion, though they also discovered that the scent of rosemary seems to impair speed of memory.
For more on this plant as a spice, I'll direct you to Gernot Katzer's page on Rosmarinus officinalis.
Photography resource link: Quick Tips for Better Nature Photography by Darwin Wiggett, via Nature Photographers Online.
Rosmarinus officinalis - Z6 - RHS Index of Garden Plants, Griffiths
Link to wildlife photography hints was great. I have to admit that sometimes I use Photoshop to put a light in the eye of a bird when I was unable to capture it with the camera.:)
Harry
Rating the entire species Zone 6 is definitely not accurate. "Cold hardiness varies considerably, depending on selection. In general, upright varieties are hardier, while prostrate ones (originally from Majorca and Corsica) are more tender, suffering damage at 20F/-7C or even higher" (Sunset WESTERN GARDEN BOOK). If it's true that Rosmarinus officinalis 'Arp' is the "hardiest rosemary, taking temperatures as low as -10F/-23C" (Sunset) then even that one will not survive every winter in Zone 6.
this picture is the most beautiful picture i have ever seen.