Onions, leeks, garlic, chives are alliaceous plants.    From Wordnet, Princeton University. 

With the Batavian it usually is formed of chervil, tarragon, and that delicate alliaceous salad herb, chives.    From Wordnik.com.  [The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken] Reference

Shoppers, like me, flocked to the stall, charmed by the man in the garlic gloriole, whose sunny disposition seemed fueled by the alliaceous aura above.    From Wordnik.com.  [French Word-A-Day:] Reference

Several species of alliaceous plants grow within the Confederate States.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference

The alliaceous odors, with the cacodylic group (asafoetida, ichthyol, etc.).    From Wordnik.com.  [Studies in the Psychology of Sex, Volume 4 Sexual Selection In Man] Reference

It is one of the alliaceous tribe, which consists of the onion, garlic, chive, shallot, and leek.    From Wordnik.com.  [The Book of Household Management] Reference

Most of the exotic alliaceous plants, the leek, onion, garlic, etc., are cultivated in the Confederate States.    From Wordnik.com.  [Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural. Being also a Medical Botany of the Confederate States; with Practical Information on the Useful Properties of the Trees, Plants, and Shrubs] Reference