The Cryptocoryne albida group of mainland Asia (Araceae).

Jacobsens milestone 1980 paper about the albida complex (albida, crispulata and retrospiralis). All other strap leaved forms (except APO) are placed as varieties of crispulata.

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Die schmalblattrigen Cryptocorynen des asiatischen Festlandes.

An update of the 1980 article with description of the varieties. Bigger, more pictures, broken down into sections because of its sheer size.

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The rare and tricky species from peat bogs that prove difficult if not impossible to grow seem to respond very well when cultivated in humus-rich leaf-mould made from Beech leaves (Fagus sp.).

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Der Cryptocoryne cordata Griffith - Komplex (Araceae) in Malesien

More material gathered during recent years has shown that the hitherto held opinion of Cryptocoryne cordata Griffith, C. grabowskii Engler, C. zonata De Wit, and C. diderici De Wit as separate species is no longer tenable. They are therefore deprecated from full species and placed as varieties of C. cordata. (Jacobsen 2002).

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Cryptocoryne Xpurpurea Ridley nothovar. borneoensis N. Jacobsen, Bastmeijer & Y. Sasaki (Araceae), eine neue Art aus Sarawak

Cryptocoryne Xpurpurea Ridley nothovar. borneoensis N. Jacobsen, Bastmeijer & Y. Sasaki is new variety found in South Kalimantan. The leaf blade is cordate, brown purple, flat to somewhat bullate. The spathe is 10-20 cm long, the limb 3-6 cm long, ovate and long acuminate, somewhat rugose, shiny bright red, sometimes dark red; the collar/collar zone is distinct, somewhat narrow, dotted towards the opening.