Dumbcane in Cross Section

From: Ted.Held at hstna.com on 2001.07.23 at 20:14:10(7095) Well, my putative D. seguine has a very ordinary looking cross section. I made my cut perpendicular to the stem, thus cutting across any conductive structures. There is a brownish "bark" part at the outer perimeter, containing what look like depleted cells. The interior looks like a green honeycomb with rather uniform, turgid cells containing what looks like uninteresting liquid. The sap has a brownish-white latex appearance, the brown becoming darker on exposure to air. I made a 2% infusion of freshly-crushed stem in deionized water. It has a pH of 6.1, for those who might be interested. I saw no signs of raphides in the microtomed section or in the fresh, wet sap. Like before, I will gladly send photomicrographs (with micron bars for sizing of structures in the pictures) to anyone contacting me directly. I have one of the outer section of the microtomed stem that is nicely colorful, and one of some of the wet sap wetting the microscope slide. The first one is the more interesting since it shows both types of cells quite well. +More ted.held@hstna.com

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