#10 Clematis aristata

IMG_8644cgClematis aristata in family Ranunculaceae. A vigorous climber, widespread, occurring in moist sheltered forests, it is also found in NSW, Vic, Qld and W.A. The name Clematis is from Greek “clematis” meaning “a climber”, and aristata from Latin “arista” meaning bristle or thorn, in reference to the fruits.

IMG_1418gIt has common names of Goatsbeard and Old man’s beard, probably arising from the wonderful fluffy white seed heads (photo right) following flowering on the female plants. (It is dioecious, meaning separate male and female plants.)

IMG_1792gThe plant is a leaf climber, its leaf stems coil around the branches of other plants. The leaves themselves are quite variable as seen in the photo on the left. They are opposite and trifoliolate (having three lobes or leaflets), usually solid green in colour, but sometimes variegated. The margins (edges) of the leaflets can be entire or toothed. Those I measured varied from about 3 to 7 cm  long and about 3 to 5 cm wide.

IMG_9232gThe flowers are very showy. The male and female flowers are similar: numerous creamy-white pointed stamens (male) or plumed styles (female) surrounded by 4 large white petal-like sepals in a star pattern. I first started this write-up in early 2015. I am re-visiting it now as I prepare a drawing to submit to Botanica in 2018. In order to accurately draw the plant, I wanted to further research the male and female flowers. Exactly what are the differences? I have several plants of C. aristata growing in my native garden in the Blue Mountains, and they are all flowering now that spring has arrived. After a few weeks of careful observation, I am pretty sure I photographed both male and female flowers on Maat. IMG_8640gThe image above is a male flower, while the image on the right, taken on Dec 5, 2011 is a female flower, the “plumed style” surrounded by staminodes (sterile stamens). (Careful observation to ensure that what I thought was a female style was not in fact the stamens of the male flower unfolding. The form of this flower has not changed over time, and all flowers on this plant, old and new, look the same. I will continue to observe these plants as the fruit does or doesn’t develop.  Still0173g.jpgI used my trusty USB microscope to take this 10x image).

When we arrived on the island in early December there were masses of flowers on plants on the western side of the track near the Red Shed and on the track to the Whim shed. These areas have a sheltered NW to northerly aspect.

IMG_1330gAt the start of January, The flowers were finishing and the female plants were forming fruit. The botanical description of the fruit is “achenes ovate, flattened, with plumose style”. This is best explained by the picture on the left which shows one “seed head” with many achenes (small, dry, one-seeded fruit), each having a feathery tail that will carry the seed on wind. The achene is about 4mm long and 1.5 mm wide, and the remnant of the “plumose style” is approximately 25mm long.

IMG_1316gAnd here’s the final stage (photo right) where the dried dark brown seeds separate easily and are ready to fly! By the end of January, the flowers were gone and the female plants looked like they were covered in balls of fine cotton wool.

20150704_164437ClematisgI am working on two pieces for this plant. One is a graphite drawing (poor quality photo left) showing the cycle from seed to flower with the view to Cox Bluff in the background. The other is a macro stippling drawing in ink of the amazing seed head.

 

 

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One Response to #10 Clematis aristata

  1. Pingback: My Maatsuyker Island Plant List | MaatsuykerDreaming

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