Oak leaf

Oak Leaf.jpg
Dried oak leaf
Scientific name: Scientific name
Description: Round, cartoon-like ruffled leaves.[source?]
Location: All over the forest floor and collected in leaf-fall.[90]
Usage: The dried leaves are to be stored in a dry location until the time of usage, when they are chewed into a thick poultice and spread on a wound.[90]
Effect: Stops infection from setting in.[90]
Parsley

Parsley.jpg
Parsley
Scientific name: Petroselinum crispum[171]
Description: A long-stemmed plant with ragged-edged crinkly leaves, Sharp scent, tastes cold and fresh, tastes the same fresh or dried.[172]
Location: Grows best in moist, well drained soil, with full sun.[source?]
Usage: Eaten.[173]
Effect: Stops a queen from producing milk if her kits die, don't need milk anymore, or are producing too much milk.[173] Also used to cure bellyache.[174]
Poppy seeds

Poppy Seeds.jpg
Poppy seeds
Scientific name: Scientific name
Description: Tiny, round black seeds that are shaken out of a dried poppy flowerhead.[175]
Location: All over forest.[source?]Petal's old Twoleg house in SkyClan's gorge territory.[37]
Usage: Chewed on.[129]
Effect: They can help a cat sleep,[176] soothe shock or distress,[177] or ease pain.[129] Not recommended for nursing queens.[178]
In Bluestar's Prophecy, Bluekit and Snowkit dare each other to eat poppy seeds, although neither kit knew what they were.[179] Goosefeather confirms that they are, in fact, poppy seeds, and it will just make Snowkit sleepy.[179]
In Firestar's Quest, Echosong tells Sandstorm that she is glad to know what it is for, although she was unable to find any at first. Petal then reveals that her former Twoleg owner has a garden full of poppy seeds.[37]
In Into the Wild, Yellowfang asks for poppy seeds to ease the pain in her leg.[129] Later, Spottedleaf gives Firepaw a poppy head, and tells him to shake out one or two seeds, saying to give them to Graypaw, who was still upset over the loss of Lionheart, his mentor.[180]
In A Dangerous Path, Cinderpelt brings Bluestar poppy seeds to try and calm her down.[177]
In Firestar's Quest, Cinderpelt brings poppy seeds to Sootpaw to try and ease him, who was still in shock after the death of his mother.[181]
In Sunset, Leafpool tells Sorreltail that while she can fetch poppy seeds to help Sorreltail's pain after kitting, it would be better for her newborn kits if she didn't eat them.[178]