Ferns of Singapore

Singapore is a small island (280 square miles)
For the British, it is about half as big again as the Isle of Wight

It is a popular holiday and stop-over destination
Here is a map showing the fern locations of Singapore taken from the data published in The urban pteridophyte flora of Singapore by Benito C. Tan, Angie Ng, Angie Ng-Chua L.S., Anne Chong, Cheryl Lao, Cheryl Lao,Machida Tan-Takako, Ngiam Shih-Tung, Aries Tay & Yap Von Bing

The locations are shown (by default) grouped by the numbers of ferns in each location
The highest number of ferns is in the Central Catchment with 16
You can also see the ferns in each of the locations described in the paper by chosing “Fern locations” in the legend
Clicking on any location will bring up the list of ferns in that location

How to tell the difference between Cheilanthes tomentosa and Cheilanthes lanosa

These descriptions are taken from pages 241 and 243 of Fern Grower’s Manual by Barbara Joe Hoshizaki and Robbin C. Moran

Thes are pictures taken from my Cheilanthes in my garden in Waterlooville
There are both scales and hairs on the rachis so it is Cheilanthes tomentosa

Martin Rickard:

If you are unsure it is almost certainly Cheilanthes tomentosa. I cannot remember seeing C. lanosa in an English garden. Maybe I`ve seen it correctly labelled in nurseries, but that might have been in the US. The most obvious difference is C. tomentosa is pale green, lanosa is a richer green. There are scale/hair differences that can be retrieved from any flora, but not easy to interpret unless with good magnification.
C. tomentosa has a pale brown rachis, lanosa is dark brown.
C. tomentosa is ‘silvery’ particularly in the croziers when unfurling, C. lanosa is green.
C. tomentosa is a neater fern with pinnae closer together and slightly narrower than C. lanosa. In C. lanosa pinnae are clearly deltate, in C. tomentosa not so obviously deltate

Image courtresy of Martin Rickard: