Arisaema erubescens

Section Sinarisaema.

Arisaema erubescens  has for a long time been muddled with Arisaema consanguineum, a problem that frustratingly still occurs all too often today, especially within horticultural circles, but sometimes within more scientific literature also.

G. and L. Gusman’s monograph ‘The Genus Arisaema’ gives a good and accurate account of the differences, of which there are several. Compared side by side, Arisaema erubescens and consanguineum really should not be confused.

Nearly all the ‘Arisaema erubescens’ in horticulture and those offered by nurseries are  in fact Arisaema consanguineum, typically forms with a reddish spathe hoodMany of these are imported from China under this incorrect name. It is a shame that most nurseries do not know, or are unwilling, to correct the name of their plants.

Arisaema erubescens has one, or very occasionlly, two radial leaves with no extended filaments at the tips. The inflorescence emerges before the foliage and is a pinkish / brownish colour with white stripes and is very distinctive. The spadix tip is green. Petioles and peduncle are also distinctive and have dark pinkish striations.

I am aware that a ‘green form’ of Arisaema erubescens exists also, but I have yet to see a photo of this.

A vigorous and attractive garden plant, being easy and hardy in a well drained soil in light shade.

Tuber:

The tuber is subglobose and stoloniferous, reaching around 6cm or 7cm in diameter, rapidly multiplying via underground stolons. Some of these stolons can travel a fair distance from the adult tuber and can be be a several cm in diameter. In fact, the stolons of Arisaema erubescens are the largest I have seen. Sessile offsets are never made.

In addition, the tubers of Arisaema erubescens are a bright vibrant green colour (at least in my plants). The only other species I have seen with tubers of this colour is Arisaema lobatum.

Seeds and germination:

Seeds can be stored dry with no significant loss of viability. Germination is easy and typically takes around 4 – 6 weeks.

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