Data from: Taxonomic revision of the genus Tzveleviochloa (Poaceae, Aveninae) in India
Data files
May 22, 2026 version files 36.78 KB
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README.md
5.01 KB
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Tzveleviochloa_GPS_Cooirdinates.xlsx
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Tzveleviochloa_morphological_data.xlsx
22.10 KB
Abstract
The taxonomy of Tzveleviochloa in India is revised based on morphological evidence, comprehensive observations of herbarium specimens and field records, and several botanical explorations in the study area. The accepted diversity is increased from two to five species, including two recently described species. The genus is distributed in the Western and Eastern Himalaya and the Western Ghats. Pilose hairs on leaf blades can distinguish species, along with panicle shape and size, glume nerves, lemma, and anther length. We present a comprehensive taxonomic treatment of the genus Tzveleviochloa, including a description of the genus and its species, taxonomic keys, flowering and fruiting, habitat and distribution comments, and taxonomic notes. In addition, we discussed the history of the genus, its morphological details, geographic and altitudinal distribution, and a preliminary assessment of conservation threats.
Dataset DOI: https://doi.org/10.1002/njb.05017
Description of the data and file structure
Morphological characters of different spirelets were measured in units of millimeters (mm) under a stereo zoom microscope on the examined specimens. We assessed the morphological boundaries between species to distinguish the species morphology using a box plot that shows the mean, median, interquartile range, and minimum and maximum values. In addition, the Geographic Positioning System (GPS) coordinates (latitude and longitude) were obtained from examined specimens, recorded in decimal form, and used in IUCN Red List analysis with the GeoCAT tool and for preparing the distribution map.
Files and variables
File: Tzveleviochloa_GPS_Cooirdinates.xlsx
Description: Raw data for the Geo-CAT tool and distribution maps (Table 2 and Figure of Manuscript)
variables
File description: This Excel file contains the coordinates (latitude and longitude) of examined specimens of the species. In accordance with GBIF standards, the geographic coordinates have been generalized to a 0.1-degree precision for threatened species Tzveleviochloa parviflora.
File: Tzveleviochloa_morphological_data.xlsx
Description: Raw data for box plot analysis using morphological data (Figure 3)
Variables
File description: This Excel file contains the morphological measurements of each floral part of the spikelet in millimeters (mm)
Sheets (1-5): morphological data of spikelets
| Variable name | Description | Unit | Abbreviation |
|---|---|---|---|
| Lower glume length | Measured from the base to the tip of the lower glume | mm | LGL |
| Lower glume width | Measured in open and flat conditions | mm | LGW |
| Upper glume length | Measured from the base to tip of the upper glume | mm | UGL |
| Upper glume width | Measured in open and flat conditions | mm | UGW |
| Lemma length | Measured from base to tip of lemma, including lobes and excluding awn | mm | LL |
| Lemma width | Measured in open and flat conditions | mm | LW |
| Palea length | Measured from the base to the tip of the palea | mm | PL |
| Anther length | Measured over the anther, excluding the filament | mm | ANTL |
| Awn length | Measured from the point of insertion to the tip of the awn | mm | AWL |
| Column length | Measured from the point of insertion to the knee of the awn | mm | - |
| Subula length | Measured from the knee to the tip of the awn | mm | - |
| Lemma base to awn insertion point | Measured from base to awn insertion point, excluding awn column | mm | LBTAIP |
| Awn insertion point to lemma length | Measured from awn insertion point to lemma tip, excluding awn subula | mm | AIPTLT |
| Callus hairs length | Measured the longest hair of the callus | mm | CHL |
| Lodicules length | Measured the base to tip of lodicules | mm | LDL |
| Lemma tip mucro | Measured the longest nerve prolongation at the lemma tip | mm | LTM |
| Palea spicules | Measured the spicules of the palea keel | mm | PS |
| Lower glume mucro | Measured the prolongation of the middle nerve of the lower glume | mm | - |
| Upper glume mucro | Measured the prolongation of the middle nerve of the upper glume | mm | - |
Code/software
- For the IUCN Red List assessment, the GeoCat tool was used to infer the Extent of occurrence (EOO) and Area of Occupancy (AOO)
- For Morphological comparison, the statistical models (Box Plot) were conducted using Microsoft Excel.
Access information
Other publicly accessible locations of the data:
- NA
Data was derived from the following sources:
- NA