{
    "system": "GoGuides Verified Text",
    "api_version": "verified-text-v1",
    "status": "ok",
    "response_type": "verified_text_record",
    "source_key": "britannica_1911",
    "source_title": "Encyclopaedia Britannica (1911)",
    "license_code": "public_domain",
    "attribution": null,
    "license_url": null,
    "chunk_id": "1911:duckweed:b79c695a8d22",
    "title": "DUCKWEED",
    "section": null,
    "hash_alg": "sha256",
    "hash_sha256": "80436f58306e337b22a55d1946e24c22166743e87242e8cfc9d027443cfa91ca",
    "normalizer": {
        "name": "ggnorm",
        "version": "1.0"
    },
    "verified_text": "duckweed, the common botanical name for species of _lemna_ which form a green coating on fresh-water ponds and ditches. the plants are of extremely simple structure and are the smallest and least differentiated of flowering plants. they consist of a so-called \"frond\"--a flattened green more or less oval structure which emits branches similar to itself from lateral pockets at or near the base. from the under surface a root with a well-developed sheath grows downwards into the water. the flowers, which are rarely found in britain, are developed in one of the lateral pockets. the inflorescence is a very simple one, consisting of one or two male flowers each comprising a single stamen, and a female flower comprising a flask-shaped pistil. the order lemnaceae to which they belong is regarded as representing a very reduced type nearly allied to the aroids. it is represented in britain by four species of _lemna_, and a still smaller and simpler plant, _wolffia_, in which the fronds are only one-twentieth of an inch long and have no roots. [illustration: 1, _lemna minor_ (lesser duckweed) nat. size. 2, plant in flower. 3, inflorescence containing two male flowers each of one stamen, and a female flower, the whole enclosed in a sheath. 4, _wolffia arrhiza._ (2, 3, 4 enlarged.)]",
    "source_url": "https://archive.org/details/EB1911WMF",
    "observed_at": "2026-02-08 18:42:45",
    "integrity": {
        "hash_check": "match",
        "hash_scope": "full_normalized_text",
        "computed_sha256": "80436f58306e337b22a55d1946e24c22166743e87242e8cfc9d027443cfa91ca"
    },
    "machine_use": {
        "read": true,
        "cite": true,
        "decision": "verified_public_domain_text"
    },
    "goguides_data_license": "https://www.goguides.com/data-license",
    "goguides_data_license_version": "2.0",
    "documentation": {
        "white_paper_url": "https://www.goguides.com/white-paper.php",
        "pdf_url": "https://www.goguides.com/whitepapers/goguides-ai-source-clearance-white-paper.pdf"
    }
}