Purple Perfume spreading by rhizome?

[ShiniKoroshi]

Pics-is this typical or a survival reaction to 24°F temperature which is the lowest Ive ever experienced in Florida.

BTW- these Purple Perfume were planted in the Fall last year and are just now flowering, so no seed yet.

 

[StoneCarver]

Looks like it might be spreading via rhizome. In that case, it might make a nice groundcover.