Contributions of leaflet anatomy to the distinction of two species of <i>Ceiba</i> Mill. (Malvaceae—Bombacoideae): <i>Ceiba pubiflora</i> (A. St.-Hil.) K. Schum. and <i>Ceiba speciosa</i> (A. St.-Hil.) Ravenna
Bibliographic record
Abstract
Ceiba is a genus of tree species with a predominantly neotropical distribution which, in general, are readily recognized in the landscape in the vegetative stage by their large trunk with prickles, commonly ventricose (swollen). Some Ceiba species have overlapping geographical distributions, such as Ceiba speciosa and Ceiba pubiflora. These species have quite uniform vegetative features, making it difficult to differentiate them when they are not in flowering. Here, we examined the leaflet anatomical features of the two species to distinguish them while in the vegetative phase. Fully expanded leaves were collected, fixed, embedded in paraffin, and cross-sections were made from the leaflets' midvein, margin, and intercostal region. Ceiba speciosa has hypostomatic leaflets, with continuous biseriate epidermis along the adaxial face, rectilinear margin with a vascular bundle at the end of the margin, while C. pubiflora has amphistomatic leaflets, with interrupted biseriate epidermis along the adaxial face and curved margin on the abaxial face. These taxonomically important anatomical features of C. speciosa and C. pubiflora leaflets have provided additional characters good for distinguishing the species, especially when they are in the vegetative phase, and therefore updates the existing accounts of the characters useful for the taxonomy of Malvaceae.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".