Aroids forum: Two different modes of growth in Araceae

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Name: Aaron
New York (Zone 7a)
Aroids
Image
Araceae
Jan 20, 2018 11:50 AM CST
Hi all! I know that the subject line looks like the title of an empirical article but what I would like to show you all is actually quite straightforward. I noticed that some araceae that I own (mainly Pothos and Spathiphyllum) tend to grow leaves in two different ways. Sometimes they will put out leaves in a way that they sort of 'shoot' out and sometimes they will put out leaves by unfurling them like a fern.

Here are some examples:

Pothos 'shooting' out:
Thumb of 2018-01-20/Araceae/d99a16

Pothos unfurling:
Thumb of 2018-01-20/Araceae/64dc9c

Spathiphyllum 'shooting' out:
Thumb of 2018-01-20/Araceae/d2a465

Spathiphyllum unfurling:
Thumb of 2018-01-20/Araceae/c223d7

Has anyone else observed this? Why do you think these plants do this? Is there any scientific evidence for why this happens?

Thanks!!

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