Dave Looks for Plants

Journal of a plant explorer

Rio Numbami

The next day we started out going to a nearby forested area just outside Zamora to the northwest.  There we found more of the Podocarpus form of Costus laevis at about 1100 meters, but there was not a lot of forest in the area, so we next headed for the higher altitude reserve area of Numbami Alto.

 

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In this area we found many more plants of the pubescent form of Costus laevis that we had seen at the deserted farm at Podocarpus.  This form seems to only be found at the higher altitudes (between 1200 and 1600 meters) whereas the Podocarpus form is found below 1200 meters.  The forms of the flowers and the hairiness of the leaves varies somewhat, but the plants are recognizable and distinguishable by the size of the inflorescence and the various flower parts – especially by the much smaller calyx and bracteole. 

The Podocarpus form…..

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And the pubescent form …..

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Here was a pubescent form found with pale yellow flowers.

 

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In his garden, Marco has a plant of the species Costus erythrophyllus which he collected locally many years ago, but he could not remember for sure exactly where.  Here is a photo I took of this plant during my 2007 visit in Marco’s garden – and one with flowers taken recently by Marco Jr.

 

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He thought it might have been at the nearby Quebrada Tunantza Alto, so we headed there next.  We did find a plant growing there that has purple backed leaves, but it is not the same plant as in Marco’s garden, and I don’t think it is C. erythrophyllus.  It was not in flower so I cannot say for sure but I think it more likely to be another form of C. laevis – possibly the pendent ‘El Gato’ form like the ones I saw in 2013 in Peru.

Here is the one seen at Quebrada Tunantza

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