Morphology and Development of Sunken Terminal Cephalium in<i>Discocactus</i>(Cactaceae)
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Bibliographic record
Abstract
Growth of photosynthetic portions of Discocactus shoots is seemingly not suppressed by cephalium formation, as vascular traces are prominent between the vascular cylinder and the circular juncture of cephalium and juvenile growth. Neither of these morphological traits has previously been documented in the Cactaceae. I therefore provide a pair of hypotheses consistent with these morphological traits and suggest ways to test these hypotheses, although do not test them myself. One hypothesis for these morphological traits is that the shoot vascular cylinder bifurcates when the cephalium first forms, with one cylindrical ‘branch’ of the vascular cambium terminating in the shoot apical meristem and the other concentric cylindrical ‘branch’ of the vascular cambium terminating in a circular meristem at the base of the terminal cephalium. A second hypothesis is that subapical development occurs very slowly surrounding a depressed shoot apical meristem in Discocactus. Vegetative portions of the shoot mature sufficiently slowly that the cephalium can be well formed even while juvenile areoles and photosynthetic internodes continue to grow and develop for several years after production by the juvenile phase of the shoot apical meristem.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it