# Read leaf-vein diagrams in ManYue: trace veins before inferring plant groups Language: en Canonical: [Read leaf-vein diagrams in ManYue: trace veins before inferring plant groups]() 中文：[中文 HTML]() English: [English HTML]() Published: 2026-11-14T00:00:00+08:00 Modified: 2026-11-14T09:31:46+08:00 Author: Bison Distinguish parallel and netted veins in original diagrams, checking main veins, leaflets and classification limits rather than identifying species from outline. English translation of the [Chinese original](), translated on 2026-11-14. Original publication dates, attribution, code and version notes are retained. A narrow leaf does not prove every vein is parallel, and a netted surface does not identify a species. Read two original venation diagrams in ManYue, tracing connections before relating them to common plant-group characteristics. Analyse visible structures only, without collecting, eating or identifying wild plants. The app provides viewing and return access, not automatic plant identification. ## Fix tip, base and diagram scope Draw A as one complete leaf, base below and tip above, with major veins roughly parallel from base toward tip. B has a midvein, lateral branches and finer connections. Label petiole, blade and legend, noting non-scale construction. Record file, location and scope. Establish whether it shows one blade or a compound leaf’s leaflets: gaps between leaflets are not vein-network holes, and the leaf margin is not a midvein. ## Trace A’s major veins Trace one major vein in A from base toward tip, then return and follow the next. Perfectly vertical screen lines are not the criterion. Curvature and perspective can affect drawing directions; the main pattern is roughly parallel extension across the blade. Record small cross-connections separately: their presence does not automatically negate parallel major venation. If fine veins are unclear in a scan, state only what is visible rather than invent their presence or absence in the specimen. ## Trace B from midvein into a network Locate B’s midvein entering from the petiole, then follow laterals, branches and fine connections. At crossings, consult the legend: this original uses explicit connection points, since crossed ink alone need not be a junction. Counting laterals is insufficient; branching and connectivity define the pattern. A cropped blade limits the visible region and cannot establish that all laterals end at the margin. A vein network also does not divide the blade into detached pieces. ## State group associations as common patterns Parallel venation is common in monocots and netted venation in eudicots, but one schematic leaf does not determine classification absolutely. First record A’s roughly parallel major veins and B’s visible network, then list consistency with common group traits. Do not name a tree species from B or equate traditional dicots and eudicots without qualification. If the source is a stylised comic, assess whether its visible evidence is adequate rather than assume anatomical fidelity. ## Separate supplied traits from missing evidence If the text supplies cotyledons, floral parts or stem vascular arrangement, record each by source and scope rather than infer it from the outline. No flower in A means no observed three petals; no seed in B means no verified two cotyledons. Additional traits can inform classification, but a general classification table is not observation of every trait in this drawing. Mark missing fields unresolved instead of backfilling typical group features as measurements of this leaf. ## Keep the same leaf when enlarging Use existing zoom to inspect major and fine veins, confirming A or B by markers or nearby text before tracing base to tip. Pixel jaggies are not botanical serrations, and compression spots are not network junctions. Return to the whole page to connect local observations to the blade. If a clearer edition helps, record it as another source rather than silently claim its details were visible in the low-resolution version. ## Check outline shortcuts and false junctions If every narrow leaf becomes monocot, revisit veins and other evidence. If each crossing becomes a junction, check the legend. Separate overlapping blades before tracing one so a rear vein is not joined to a front blade. Missing base or midvein supports candidates, not imagined confirmation. Share the original diagrams and annotation list. These schematics provide no edibility, medicinal or field-safety identification; the task concerns accurate diagram relations and evidence limits. ## Reopen and verify two explanations Reopen A and B and check base, tip and main veins. Explain each visible pattern, compatible group and missing evidence in a separate paragraph. Retain full diagram, local positions, junction conventions and classification conditions rather than only the words parallel and netted. Explain cross-connections among parallel major veins and the insufficiency of venation alone for species identification. Re-trace after an edition, blade or legend change; bookmarks locate pages without certifying unchanged biological structure. ## Related guides and sources [ManYue: Separate anatomical labels from visible legs in illustrated insect pages](); [ManYue rooted-tree reading: trace branch relationships rather than tip order](). Checked on November 14, 2026: [Apple public information]() lists ManYue 2.0.5, requiring iOS / iPadOS 15.0 or later. See the [official App Store]() for published capabilities; verify specific controls in the installed version. Method reference: [OpenStax: leaf structure and venation](). Samples, passages and controls are original exercises. Sources establish definitions and checking methods rather than new automatic analysis in the app. Manual records may be kept externally, and unknown fields should remain explicit. This article does not claim step-by-step testing on a physical device, private server or every output environment.