Sinopsis de las especies austro-americanas del género Nassella (Poaceae, Pooideae, Stipeae)
Bibliographic record
Abstract
Nassella es un género americano que, de acuerdo a su actual circunscripción, incluye unas 116 especies, distribuidas desde Canadá hasta Argentina y Chile. Se caracteriza por sus antecios con la lema notablemente convoluta, con corona apical conspicua o inconspicua y la pálea menor que la lema; asimismo, la lema presenta un patrón epidérmico distintivo. El objetivo de este trabajo es realizar una sinopsis de las 99 especies de Nassella que crecen en la región austral de América del Sur, comprendiendo la Argentina, Bolivia, sur de Brasil, Chile, Paraguay y Uruguay. Se proporciona una clave para la identificación de las especies, sobre la base principalmente de caracteres del antecio. Para cada especie se brinda la sinonimia actualizada, distribución geográfica, datos fenológicos, observaciones e ilustraciones. Se acepta a Nassella barbinodis y Nassella linearifolia es un nuevo sinónimo de Nassella caespitosa. Se designan lectotipos para los siguientes taxones: Danthonia nardoides, Piptochaetium collinum, P. gibbum, P. laevissimum, Stipa arechavaletae, S. barbinodis, S. breviculmis, S. calchaquia, S. carettei, S. clarazii var. bulbosa, S. curicoana, S. debilis var. papillosa, S. duriuscula, S. hispida, S. hyalina, S. julietii, S. longiglumis, S. macrathera, S. manicata var. media, S. mendocina, S. pratensis, S. pseudopampagrandensis, S. rupestris, S. tenuis, S. trachysperma, S. trichocaulos y S. uspallatensis. Se designa un neotipo para S. filiculmis.
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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 | 0.001 |
| Science and technology studies | 0.001 | 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) | 0.005 | 0.001 |
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".