花鸟图鉴 › 花卉

龙芋

Dragon arum

Dracunculus vulgaris · 天南星科 Araceae

龙芋
摄影:Jörg Hempel,来自 Wikimedia Commons,以 CC BY-SA 3.0 de 授权。照片未经修改(仅缩放)。
颜色
紫、黑、绿
地区
其他地区(东亚仅见于鸟园或植物园)
花期
春、夏
花形
大花头
IUCN 等级
无危 (LC)

识别特征

天南星科的多年生草本,巴尔干和爱琴海的特有种。叶大,掌状深裂,叶脉沿线偶有乳白色斑点,叶柄有蛇皮般的斑纹。花序是一个巨大的紫红到紫黑的佛焰苞,可长达 1 米,中央立着一根同色的长肉穗,像一条小龙从苞中探出头(希腊语名字即「小龙」),所以叫「龙芋」「龙百合」「吸血鬼百合」。开放时散发腐肉的臭味引来绿蝇传粉,并能自体发热到 18 度左右;佛焰苞底部的花室把昆虫关住,花粉散出后再放走。全株有毒。

栖息环境

原产地的灌丛、橄榄园、路边和石墙下,夏季干燥休眠;作奇花在温带花园和植物园栽培。

分布

巴尔干半岛特有,到希腊、克里特和爱琴海诸岛,以及安纳托利亚西南部,归化于欧美部分地区;东亚仅植物园和少数爱好者栽培,中国、日本、新加坡均无野生。

花期

4 到 6 月,春末;一个佛焰苞只开两三天,第一天臭味最浓。

拍摄建议

以下为 FilmAnalysis 编辑的拍摄经验,不是资料来源中的内容。

紫黑的佛焰苞吸光,加一档曝光,侧光或逆光让丝绒般的质感和褶边显出来,浅色背景比深色好。竖幅平视拍一米长的肉穗从苞中立起;微距拍叶柄的蛇皮斑纹。臭味第一天最重,拍完就走。有毒,别碰汁液。

适合的摄影风格

立起的紫黑肉穗;叶柄蛇皮斑纹的微距。

相似物种

巨花魔芋(大得多,苏门答腊);斑叶疆南星(Arum maculatum,小,佛焰苞淡绿);魔芋(肉穗同样高耸、苞片紫褐,东亚可见)。

相关徽章

暂无。本种还没有经过验证的照片识别,所以没有对应的徽章:图鉴里有名字不等于照片里有证据。

本页插图为 FilmAnalysis 原创绘制。照片来自维基共享资源,授权和作者见图下说明。

收录缘由:本种来自 赏花清单(GBIF 分类骨干与维基数据核对)。名称以GBIF 分类骨干和维基数据为准,事实依据下列资料来源,照片识别暂不提供。

资料来源

Flora & Birds › Flowers

Dragon arum

龙芋

Dracunculus vulgaris · Araceae

Dragon arum
Photo: Jörg Hempel, via Wikimedia Commons, licensed CC BY-SA 3.0 de. Unmodified apart from resizing.
Colour
purple, black, green
Region
Elsewhere (in East Asia only in bird parks or botanic gardens)
Season
spring, summer
Shape
large head
IUCN status
Least Concern

Identification

An arum perennial endemic to the Balkans and the Aegean. Large deeply palmate leaves with occasional cream flecks along the veins and snakeskin-mottled stalks. The inflorescence is a huge purple-red to purple-black spathe up to a metre long with a long spadix of the same colour standing in it like a small dragon peering out (the Greek name means little dragon), hence dragon arum, dragon lily and vampire lily. It gives off a stench of rotting meat to draw blowflies as pollinators and heats itself to about 18 °C; a floral chamber at the base of the spathe holds the insects until the pollen is shed. The whole plant is poisonous.

Habitat

Scrub, olive groves, roadsides and the foot of stone walls at home, dormant through the dry summer; a curiosity in temperate gardens and botanic gardens.

Distribution

Endemic to the Balkans as far as Greece, Crete and the Aegean islands, and to south-western Anatolia, naturalised in parts of Europe and America; only in botanic gardens and a few collections in East Asia, with no wild plants in China, Japan or Singapore.

Season and behaviour

April to June, late spring; a spathe lasts two or three days, the smell strongest on the first.

Photography tips

These are the FilmAnalysis editors' notes, not content from the sources.

A purple-black spathe swallows light, so add a stop; side or back light brings out the velvet texture and frilled edge, and a pale background works better than a dark one. A portrait frame at eye level for the metre-long spadix rising from the spathe; macro for the snakeskin stalks. The smell is worst on day one, so shoot and leave. Poisonous: avoid the sap.

Photographic styles

A purple-black spadix standing up; macro of snakeskin stalks.

Similar species

Titan arum (far larger, Sumatra); lords-and-ladies, Arum maculatum (small, pale green spathe); konjac (a similarly tall spadix and purple-brown spathe, seen in East Asia).

Related badge

None yet. No validated photo recognition exists for this species, so no badge is tied to it: a name in the encyclopedia is not evidence in a photograph.

The illustration is original FilmAnalysis artwork. The photograph is from Wikimedia Commons; its licence and author are under it.

Why it is listed: this species comes from the Flower checklist (GBIF backbone and Wikidata verified). Names follow the GBIF backbone and Wikidata; the facts follow the sources below; photo recognition is not offered.

Sources