日本語版

Crepidiastrum lanceolatum

organism / organism-hosobawadan

ホソバワダン / Crepidiastrum lanceolatum (Houtt.) Nakai

Hosobawadan, called njanabā or nigana in Okinawa; its leaves are eaten.

Photographs (captions in Japanese)

灰白色の石灰岩の上に広がるホソバワダンの株。細長いへら形の緑の葉が放射状に伸び、その間から黄色い小さな菊状の花が数十輪咲いている。

ホソバワダン(Crepidiastrum lanceolatum)の生育株。宮古島の石灰岩上に自生し、へら状の葉と黄色いキク科の頭花が見える。

写っているもの: Crepidiastrum lanceolatum (Houtt.) Nakai部位・状態: 石灰岩上に生育する株の、へら状の葉と黄色いキク科の頭花

写真: Qwert1234／ CC BY-SA 4.0／ 原画像／ 台帳の原画像

写真の範囲と来歴

被写体の確認: 原典の記載による同定。原典ページは沖縄県宮古島の野外個体として記載。専門家による再同定は行っていない。

掲載画像: Wikimedia Commons の1920px版。苦味研究所では切り抜き・色調変更なし。 表示用には幅1200px上限のWebPを配信し、台帳の原画像は上のリンクから確認できます。

On this page (8 sections)
  1. Overview
  2. Sources for this overview (3)
  3. Topic hubs
  4. Other names
  5. Follow the connections
  6. Related entries (10)
  7. Composition and content (2)
  8. Culture (1)
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Reading the bitterness

Hosobawadan (Crepidiastrum lanceolatum) is a member of the aster family called 「ンジャナバー」 (in translation: "njanabā") or 「ニガナ」 (in translation: "nigana") in Okinawa, where its leaves are eaten. Prefectural material on traditional food culture records the leaves as bitter and used in shira-ae and soups. This record concerns Okinawan hosobawadan specifically; it does not establish every way the plant is used in cooking.

Importantly, the plant usually called 「ニガナ」 (in translation: "nigana") in Okinawa differs from another plant commonly called 「ニガナ」 (in translation: "nigana") in other regions. The prefectural material notes the difference but does not give the scientific name of the other region’s nigana, so they should not simply be treated as the same species.

Sources for this overview

  1. ンジャナバースーネー

    沖縄の伝統的な食文化データベース; 沖縄県 / 2021 / government document / full text checked

    Checked for this overview: Confirmed the description identifying njanabā as hosobawadan and noting that it is usually called nigana. / Confirmed the caution that this is a different plant from 「ニガナ」 (in translation: "nigana") elsewhere.

  2. ンジャナバースーネー（ンジャナの和え物）

    沖縄県; 健康保養食材・メニュー選定委員会 / / government document / full text checked

    Checked for this overview: Confirmed the description of bitterness in its leaves and use in shira-ae and soups.

  3. Crepidiastrum lanceolatum (Houtt.) Nakai

    GBIF Secretariat / / academic database / full text checked

    Checked for this overview: Confirmed the record that Crepidiastrum lanceolatum is an accepted species.

Other names: ンジャナバー (ryu), Crepidiastrum lanceolatum (Houtt.) Nakai (la)

Follow the connections

nigana greens →is used as→ Crepidiastrum lanceolatum

Structured claims — open a section to read each claim's confidence, evidence and limits

Composition and content (2)

nigana greens is derived from Crepidiastrum lanceolatumsupported

Scope: The Okinawan ingredient njana / nigana

Note: Connected to Crepidiastrum lanceolatum (hosoba-wadan) through a prefectural source and GBIF. Not automatically merged with a different plant that shares a similar name.

States explicitly that njanabaa is Crepidiastrum lanceolatum (hosoba-wadan), and that it is usually called nigana.
Limitations: The plant cannot be identified from the name nigana alone.
Source: ンジャナバースーネー (沖縄の伝統的な食文化データベース; 沖縄県, 2021) · full text checked
Context: Treats Crepidiastrum lanceolatum (Houtt.) Nakai as the accepted species.
Limitations: The Okinawan dialect name and its culinary use cannot be confirmed from GBIF alone.
Source: Crepidiastrum lanceolatum (Houtt.) Nakai (GBIF Secretariat) · full text checked
Show dataingredient-nigana —is_derived_from→ organism-hosobawadan
claim: clm-nigana-plant-identity / type: taxonomy / updated: 2026-08-31
Crepidiastrum lanceolatum is not synonymous with a different plant that Okinawa Prefecture's materials describe as 『一般的にニガナと呼ばれる』 (in translation: "commonly called nigana")supported

Scope: a caution about the plant name usually called 『ニガナ』 (in translation: "nigana") in Okinawa

Note: The scientific name of the contrasting plant is not given in the source. Not linked to Ixeris dentata.

Notes that in Okinawa, njana is usually called nigana, but cautions that it differs from a separate plant that is generally called nigana.
Limitations: The source does not give the scientific name of the contrasting plant, so it cannot be confirmed as the same plant as the one with a similar name.
Source: ンジャナバースーネー (沖縄の伝統的な食文化データベース; 沖縄県, 2021) · full text checked
Show dataorganism-hosobawadan —is_not_synonymous_with→ "a different plant that Okinawa Prefecture's materials describe as 『一般的にニガナと呼ばれる』 (in translation: "commonly called nigana")"
claim: clm-okinawa-nigana-name-distinction / type: taxonomy / updated: 2026-08-31

Culture (1)

nigana greens is used as Crepidiastrum lanceolatumcontextual

Scope: The leaves of Crepidiastrum lanceolatum (hosoba-wadan), eaten in Okinawa as njana / nigana

Note: An ingredient source originating from Okinawa Prefecture records the leaves' bitterness and their use in shira-ae (a tofu-dressed dish) and soups. Confidence calibration (2026-08-31 review): downgraded from supported to contextual, since the grounds are only public and press cultural records.

States that the leaves of Crepidiastrum lanceolatum (hosoba-wadan) have bitterness and are used in shira-ae and soups.
Limitations: This record refers to Crepidiastrum lanceolatum in Okinawa and is not extended to plants generally called nigana in other regions.
Source: ンジャナバースーネー（ンジャナの和え物） (沖縄県; 健康保養食材・メニュー選定委員会) · full text checked
Show dataingredient-nigana —is_used_as→ organism-hosobawadan
claim: clm-ingredient-nigana-candidate-role / type: cultural / updated: 2026-08-31

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