
• (a.) Having a single floral envelope, that is, a calyx without a corolla, or, possibly, in rare cases, a corolla without a calyx.
Found on
http://thinkexist.com/dictionary/meaning/monochlamydeous/

<botany> Of a flower, having only one whorl of perianth parts. ... (09 Oct 1997) ...
Found on
http://www.encyclo.co.uk/local/20973
Mon`o·chla·myd'e·ous adjective [
Mono- + Greek ..., ..., cloak: confer French
monochlamydé .]
(Botany) Having a single floral envelope, that is, a calyx without a corolla, or, possibly, in rare cases, a corolla without a calyx.
Found on
http://www.encyclo.co.uk/webster/M/93

In botany, monochlamydeous refers to having a corolla and no calyx, or a calyx and no corolla.
Found on
http://www.probertencyclopaedia.com/browse/BM.HTM
No exact match found.