Sort alphabetically and order across sub-headings

[Zenny]

Hi,

I am trying to create a list where the ordered list numbering expands across sub-headings:

* Bacteria
** Acetobacter Species
1. Acetobacter aceti
2. Acetobacter rasens

* Fungi
** Candida Species
3. Candida famata
4. Candida firmetaria

* Others Unidentified Species
5. Escherichia species
6. Serratia species
7. Citrobacter species
8. Klebsiella species
9. Bacillus species

 How can one sort the ordered list alphabetically? 

 Appreciate any input. Thanks

Cheers,

/z