德氏拖鞋蘭（越南美人）Paphiopedilum delenatii Guillaumin 1924
兜蘭屬 · Parvisepalum 短萼亞屬
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- 命名由來與盜採史：1922 年由法國軍官在芽莊附近採得，1924 年由 Guillaumin 以法國園藝家 Delenat 之名發表。此後野外族群一度失聯近七十年，1990 年代重新發現後隨即遭到毀滅性採集，估計約有六噸植株被非法採出。今日市面上流通的個體幾乎全為人工播種苗。
- 粉紅拖鞋蘭之母：本種是 Parvisepalum 亞屬中最重要的育種親本，Magic Lantern（× micranthum）、Joyce Hasegawa（× emersonii）、Armeni White（× armeniacum）、Delrosi（× rothschildianum）等經典雜交皆源自於它。
- 不喜石灰：多數中國、越南產兜蘭生於石灰岩，習慣鹼性介質；delenatii 卻長在花崗岩與片麻岩上，介質須維持微酸性。這是新手最容易犯的錯誤。
The Orchid That Almost VanishedPaphiopedilum delenatii — Full Care Guide
Tap the 🔊 beside any heading to listen to that section.
This is an easy orchid to grow and an easy one to kill. Almost the whole difference comes down to one thing — whether you know where it used to live.
It began with a soldier's collecting label
In May 1922 a French officer named Poilane collected a slipper orchid in the hills near Nha Trang, in southern Vietnam. Two years later the botanist Guillaumin described it and named it after the French horticulturist Delenat.
Then the species disappeared from the wild record for nearly seventy years. Nobody found it again; the handful of plants in European greenhouses survived only by being self-pollinated, generation after generation. It was rediscovered in Vietnam in the early 1990s — and what followed is one of the darkest chapters in orchid history. An estimated six tonnes of plants were dug off the mountains and smuggled out within a few years. Today the species is all but gone from the wild.
There is a footnote to that story worth knowing. Precisely because there is nothing left to collect, virtually every delenatii in trade today is nursery-raised from seed. The plant on your bench was not dug off a mountain. That is not marketing copy; it is what happens after a species is collected that hard.
Where it actually lives
Evergreen forest in the hills of Khánh Hòa and Phú Yên, southern Vietnam, at 800 to 1,300 metres. More precisely: in mossy crevices on granite and gneiss bluffs above montane river canyons. The soil there is a thin sandy skin with almost no humus, and the canopy above filters roughly half the sunlight.
Every word in that description maps onto something you do on your windowsill.
Temperature: do not grow it on Nha Trang's town weather
Nha Trang is a beach town. Its summer days run 32 °C and its nights 26 °C. Grow the plant to those numbers and it will decline.
Because it does not live in the town. It lives 1,100 metres above it. Applying the standard lapse rate of 0.6 °C per 100 metres, what the plant actually experiences is about 26 °C by day and 20 °C at night in summer; about 20 °C by day and 15 to 16 °C at night in winter. Those figures land almost exactly on the culture temperatures growers have arrived at independently — two separate lines of evidence agreeing.
In practice it is an intermediate grower. Summers in Taiwan, Hong Kong or the American South are too warm without shade and air movement; a Canadian house is close to ideal.
Light: less than you think
Five to fifteen thousand lux — bright filtered light, or a spot behind one layer of shade cloth. You do not need a meter: hold your hand above the plant, and if it casts a soft-edged shadow you are close.
It will take more once acclimated, and a well-lit plant carries a noticeably deeper pink in the pouch. Move it gradually, though. A sudden jump into strong light only burns leaves.
Media: the mistake that kills it
This is the paragraph to remember.
Most Chinese and Vietnamese Paphs grow on limestone, so the people who grow them habitually add oyster shell, eggshell or lime to sweeten the mix. Delenatii is not one of those. It grows on granite and gneiss, and both are acidic rocks.
Treat it like an ordinary Paph and add lime, and the roots will quietly recede — and you will not see it coming for months. The right mix is simple: fine to medium bark, perlite, and a little sphagnum. Open, airy, moisture-retentive, and left slightly acidic.
Water: never soggy, never bone dry
Plants living in rock crevices share one condition — water arrives fast and drains fast, but the moss around the roots stays faintly damp between rains.
So: water heavily through the June-to-December growing season, and reduce from January to May. Water when the surface approaches dryness, but never let the root ball go dry all the way through. It has no true deep dormancy; drying it off for winter is a common and costly misunderstanding.
One more thing: keep water out of the crown. Combined with the high humidity it likes, a puddle sitting in the leaf axil invites crown rot, and a growth can be lost in two days. High humidity must be paired with air movement — you cannot do one without the other.
Feeding: it evolved with almost none
Think about the habitat again — thin sand, essentially no humus. This is an extremely lean environment.
So feed weakly, weekly: every one to two weeks at only one-tenth to one-quarter of the label rate. High nitrogen early in growth, switching to high phosphorus late in the season. Every month or two, flush the pot slowly with plain water to wash out accumulated salts.
Getting it to flower
It peaks in December in habitat; in cultivation most plants bloom between February and April.
The trigger is an autumn and winter day-night temperature swing — give it 8 to 10 degrees of drop, together with less water and no fertilizer. When someone grows this species for two or three years without a flower, the plant is usually fine; the room simply held one temperature all year and the orchid never learned that the season had changed.
The honest truth about the fragrance
Many references will tell you this orchid is fragrant, describing citrus, rose or magnolia. The record is not wrong, but the reality is this: the scent is very faint, and not every plant has it.
On the slipper orchid forums the usual description is “only if your nose is right up against it,” and plenty of growers report their plants have no scent at all. If you are buying it for fragrance, lower your expectations — and treat it as a bonus if you do catch it.
Why it is worth growing
Beyond the white-and-pink flower itself, delenatii holds a particular place in the slipper orchid world — it is the mother of the modern pink slippers.
Magic Lantern, Joyce Hasegawa, Armeni White, Delrosi — every one of those classic hybrids traces back to this single species. Growing a delenatii means holding the starting point of an entire family.
And the seedling on your bench carries a second story: a species that vanished from the wild and survives because people learned to raise it from seed. Growing it well is, in a small way, worth doing.
幾乎消失的蘭花越南美人 Paphiopedilum delenatii — 養護全解
點小標題後的 🔊 可聆聽該段。
這是一株很容易養、卻也很容易養死的拖鞋蘭。差別幾乎全在一件事上——您知不知道它原本住在什麼地方。
從一張一九二二年的採集標籤說起
一九二二年五月，一位名叫 Poilane 的法國軍官在越南芽莊附近的山區採到一株拖鞋蘭。兩年後，植物學家 Guillaumin 以法國園藝家 Delenat 的名字發表了它。
然後這個物種就在野外消失了將近七十年。沒人再找到它，歐洲溫室裡僅存的幾株靠著一代代自交存活下來。直到一九九年代，它在越南重新被發現——接下來發生的事情，是蘭花史上最黑暗的章節之一。估計約有六噸的植株在短短幾年內被從山上挖光、非法運出國境。到今天，這個物種在野外已經幾近絕跡。
這件事有一個很少人提的後續：正因為野外早已無可採，今天市面上流通的 delenatii 幾乎全部是人工播種苗。您手上這株不是從山上挖來的。這不是行銷語，而是一個物種被採到這種地步之後的結果。
它原本住在什麼地方
越南南部慶和、富安一帶的山區，海拔八百到一千三百米的常綠林。具體一點說，是山區溪谷旁那些花崗岩與片麻岩崖壁上、長滿苔蘚的岩縫裡。那裡的土層極薄，主要是砂質，幾乎沒有腐植質，頭頂有樹冠遮著一半的陽光。
這幾句話裡的每一個字，都對應到您阳台上的一個動作。
溫度：別照芽莊市區的氣溫養
芽莊是濱海城市，夏天白天三十二度、夜裡二十六度。如果您照這個數字養，這株蘭一定壞。
因為它不住在市區，它住在一千一百米的山上。以每上升一百米降低零點六度換算，它實際體驗到的是：夏天白天約二十六度、夜裡二十度；冬天白天二十度、夜裡十五到十六度。這組數字跟國際上通行的栽培建議幾乎完全吻合，兩個完全獨立的來源互相印證。
實務上的意思是：它是中溫型。台灣、香港、華南的夏天對它偏熱，需要遮陰加通風；加拿大室內反而很適合它。
光：比您以為的少
五千到一萬五千 lux，也就是明亮的散射光、或是遮了一層網的位置。沒有光照計也沒關係：把手放在植株上方，能看到淡淡的影子就差不多了。
適應後它能接受更強的光，而且光照足的植株，唇瓣那抹粉色會明顯更深。但請循序漸進，直接搬到強光下只會曬傷。
植料：新手最常犯的致命錯誤
這一段請務必記住。
中國、越南產的兜蘭大多數長在石灰岩上，所以養它們的人習慣在植料裡加牙醇、蛎殼或石灰，把介質調成偏鹼性。但 delenatii 不是。它長在花崗岩與片麻岩上，這兩種岩石是酸性的。
把它當成一般兜蘭加石灰，根會慢慢退掉，而且您一開始看不出來。正確的配方很簡單：中細顆粒的樹皮、珍珠岩、一點水苔，疏鬆、透氣、保水，保持微酸性就好。
水：不能澤、也不能乾透
岩縫裡的植物有一個共同特點——水來得快，也走得快，但苔蘚讓根集始終微潮。
所以：六月到十二月的生長期大量給水，一月到五月減量。判斷標準是表層接近乾就澆，但永遠不要讓根部從頭乾到尾。它沒有真正的深度休眠期，冬天斷水是很常見的誤解。
另外一點：澆水時別讓水積在葉心。搭上它喜歡的高濕度，積水的葉心很容易罹軟腐病，一兩天就會敲掉一個生長點。高濕度必須搭配通風，這兩件事不能只做一半。
肥：它原本就沒有肥
想想它的原生地——砂質薄土、幾乎沒有腐植質。這是一個養分極度貧瘠的環境。
所以施肥的原則是薌而勤：每週到每兩週一次，濃度只用建議劑量的十分之一到四分之一。生長初期用高氮，季末改高磷。每一到兩個月用清水從盆面慢慢沖一次，把累積的鹽分洗掉。
怎麼讓它開花
它在原生地的盛花期是十二月，栽培環境下多半落在二到四月。
催花的關鍵是秋冬的日夜溫差——給它八到十度的落差，同時減水、停肥。很多人養了兩三年不開花，不是植株不好，而是室內整年恒溫，它根本不知道季節換了。
關於香味，說句實話
很多資料會告訴您這株蘭有香味，描述成檸檬、玫瑰或木蘭香。這個記載本身沒錯，但實際情況是：香氣極淡，而且並非每一株都有。
國外的拖鞋蘭玩家論壇上，多數人的描述是「要把鼻子湊很近才聞得到」，也有不少人回報自己的植株完全無味。所以如果您是衝著香味來的，請把期待放低一點；若真的聞到了，那是額外的驚喜。
為什麼它值得養
除了那服白配粉的配色之外，delenatii 在拖鞋蘭的世界裡有一個特殊的地位——它是現代粉紅系拖鞋蘭的母親。
魔術燈籠（Magic Lantern）、喜歡顏（Joyce Hasegawa）、顔如玉（Armeni White）、粉國王（Delrosi）——這些經典雜交背後都站著同一株原種。養一株 delenatii，等於手上持有這整個家族的起點。
而且坐在您阳台上的這株苗，背後是一個從野外消失的物種靠人工繁殖存續下來的故事。把它養好，本身就是一件有意義的事。
Paphiopedilum delenatii Guillaumin 1924
Delenat's Slipper Orchid · subgenus Parvisepalum · 德氏拖鞋蘭／越南美人
orchidmart.ca/blogs/caresheet
orchidmart.ca/blogs/caresheet
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- Named for a soldier, nearly lost to poaching. Collected near Nha Trang by a French officer in 1922 and described by Guillaumin in 1924, the species then vanished from the record for almost seventy years. After its rediscovery in the early 1990s it was stripped from the wild — an estimated six tonnes of plants were illegally exported. Virtually every plant in trade today is nursery-raised from seed.
- The mother of the pink slippers. This is the key breeding parent of subgenus Parvisepalum: Magic Lantern (× micranthum), Joyce Hasegawa (× emersonii), Armeni White (× armeniacum) and Delrosi (× rothschildianum) all descend from it.
- It does not want lime. Most Chinese and Vietnamese Paphs grow on limestone and prefer alkaline media — but delenatii grows on granite and gneiss and needs a slightly acidic mix. This is the single most common beginner mistake with this species.
© Orchi, CC BY-SA 3.0
© Orchi, CC BY-SA 3.0
© Orchi, CC BY-SA 3.0
© KENPEI, CC BY-SA 3.0
Collected by Poilane, Nha Trang
© MNHN Paris P00333301, CC BY 4.0