Saturday, June 26, 2010
Monday, May 25, 2009
Cuscuta salina
Cuscuta salina (salt-marsh dodder) lacks chlorophyll and occurs as a symbiont on Salicornia virginica (pickleweed) or less commonly on other salt-marsh species. Stems are yellow to bright orange in color, leaves are much-reduced scales, and flowers are small, bell-shaped and white. This is the only dodder species that occurs in saline environments in our area. Cuscuta salina derives nutrients through haustoria that penetrate the host plant vascular system. Dodder is at least partially attracted to host plants by airborne volatile chemical cues.
Haustorium (pl. haustoria) = a specialized root-like organ used by parasitic plants to draw nourishment from host plants.
Saturday, May 9, 2009
Fritillaria affinis
Sunday, April 26, 2009
Cardamine nuttallii
Cauline leaves (shown below) have 3-5 entire leaflets and occur midway up the stem. This species is common throughout western Washington in moist forests. Family is Brassicaceae (Mustard) - flowers have four petals and four sepals, four tall stamens and two short stamens; seed pods (called silicles or siliques) split open from both sides to expose a clear membrane in the middle; superior, bicarpellate ovaries (Elpel).
cauline = of, on or pertaining to the stem, as leaves arising from the stem above ground level.
silicle = a dry, dehiscent fruit of the Brassicaceae family, typically less than twice as long as wide, with two valves separating from the persistent placentae and septum.
silique = a dry, dehiscent fruit of the Brassicaceae family, typically more than twice as long as wide, with two valves separating from the persistent placentae adn septum.
bicarpellate = with two carpels.
placenta (plural placentae) = the portion of the ovary bearing ovules.
septum (plural septa) = a partition, as the partitions separating the locules of an ovary.
locule = chamber of cavity of an organ, as in teh cell of an ovary containing the seed or the pollen bearing compartment of an anther. (All definitions Harris and Harris)
Sunday, April 5, 2009
Synthyris reniformis
campanulate = bell-shaped
subrotate = almost disc-shaped; flat and circular, as a sympetalous corolla with widely spreading lobes and little or no tube
sympetalous = with the petals united, at least near the base

Scrophulariaceae (figwort) family characteristics include: flowers are bisexual and mostly irregular, 4 or 5 sepals at least partially united, 4 or 5 petals united into a tube usually 2-lipped with 2 lobes above and 3 lobes below, usually four stamens in 2 pairs but a fifth stamen may be present in some species, ovary has a superior position and consists of 2 united carpels (Elpel).
Sunday, December 7, 2008
Myrica gale
Wednesday, December 3, 2008
Utriculata inflata
Utriculata inflata (swollen bladderwort) is an introduced weed from the eastern US and is in the family Lentibulariaceae (the bladderwort family). Species native to western Washington in this family include U. minor (lesser bl.), U. macrorhiza (greater bl.), U. intermedia (flat-leaved bl.), U. gibba (humped bl.) and Pinguicula macroceras (common butterwort). The Utriculata species are quite easy to tell apart based upon leaf shape and bladder shape and location. All occur in slow moving or standing water. This individual was photographed at Grass Lake in Olympia.
The bladders of this species are photographed below. The valves of the bladders open when prey agitate trigger hairs. Small crustaceans and protozoa are trapped in the bladders and broken down by plant enzymes, providing the plants with nutrients. Most, if not all of the bladderwort species are rootless and occur suspended in the water column with much-reduced, heavily-dissected leaves that would not allow for much photosynthesis (hence it's carnivorous nature).