Sometimes the Hebrew for 'apples' ["Tapuchim"] means Citrons: Taanit 29b
Beans
Dry "Turmus" beans are goat fodder: Shabbat 126b
Moist "Turmus" beans are inedible: Shabbat 127b
Capers [Tzelaf]
A Tzelaf bush was used for a Miracle, to protect a man's field when he didn't repair a fence-breach on Shabbat: Shabbat 150b
Carobs
The Carobs of one tree generally ripen in one batch: Rosh HaShanah 15b
Cedars
Enumeration of 4, or 10, different species of cedar: Rosh HaShanah 23a
Considering myrtle to be a type of cedar: Succah 37a
Citrons
Sometimes the Hebrew for 'apples' ["Tapuchim"] means Citrons: Taanit 29b
Their cycle of growth: Rosh HaShanah 14b-15b; Succah 31b, 35a, 39b-40a
The taste of the fruit and tree: Succah 35a
The touch of hands is extremely detrimental to the Citron's growth: Rosh HaShanah 15a
How much water, and from which sources, is necessary for a Citron's growth: Succah 35a; Kiddushin 3a
Dates
Date Trees have more branches than standard trees: Berachot 16a
Their branches are raised high off of the ground: Megillah 14a
Volume of Seeds: Yuma 79b
Better in Eastern Areas: Yuma 83b
Dividing palm trees as males and females: Pesachim 53a
The Dates of one tree generally ripen in one batch: Rosh HaShanah 15b
Process dates quickly, lest you eat them while harvesting: Pesachim 113a
Date palms have one "heart": Succah 45b; Megillah 14a
Fenugrec
Determination of the end of their period of growth: Rosh HaShanah 12b
Figs
Aren't collected in a Single Harvest: Pesachim 56b
The growth pattern of a species of White Figs: Rosh HaShanah 15b
Flax
How to take care of flax: Shabbat 140b
Grapes
Whether they grow more from rain or from underground resources: Rosh HaShanah 14a
Grains
List of the 5 grains: Pesachim 35a, Menachot 70a
Definition of Kusmin: Pesachim 35a, Menachot 70a-b
Definition of Shifon: Pesachim 35a, Menachot 70a-b
Definition of Shibolet Shual: Pesachim 35a, Menachot 70a-b
Definition of Karmit: Pesachim 35a, Menachot 70a-b
Degree of natural deterioriation over time of stored grain in storage over time: Bava Metzia 40a
Determination of the end of their period of growth: Rosh HaShanah 12b
Whether they grow more from rain or from underground resources: Rosh HaShanah 14a
Barley is considered animal fodder: Sotah 14a
Grasses
"Chatzav" is deer fodder: Shabbat 128a
Hyssop
Varying Species of Hyssop: Shabbat 109b
Kidah
Is it a green or a tree: Eruvin 34b
Kishut - Vine-Gourd
One must give greater room to Kishut than to other species, because it will harden: Pesachim 39b
Whether Kishut is a vegetable or tree [regarding Grafted/Mixed Species]: Shabbat 139a
Mosses
Are they considered items which grow from the ground: Eruvin 28b
Mushrooms
Are they considered items which grow from the ground: Shabbat 107b, Pesachim 56b
Mustard
Mustard seed is food for doves: Shabbat 128a
Myrtle
The fruit and the plant taste identical: Succah 32b
A type of Myrtle known as "Egyptian Myrtle": Succah 33a [See Rashi]
Considering Myrtle to be a type of Cedar: Succah 37a
The righteous are called "Myrtles": Megillah 13a
Olives
Olive Trees have more branches than standard trees: Berachot 16a
Determination of the end of their period of growth: Rosh HaShanah 12b
The Olives of one tree generally ripen in one batch: Rosh HaShanah 15b
Status as a Grain: Pesachim 35a, 114b; Menachot 70b
Whether Rice/Millet rots or ferments: Pesachim 35a
Liability for them as Leaven on Pesach: Pesachim 35a
Use for Matzah for Pesach: Pesachim 35a
Requirement for Dough-Tithing: Pesachim 50b-51a
Saffron
The way in which its leaves develop: Niddah 20a
Turnips
Turnips are food for ravens: Shabbat 126b
Vegetables & Seeds
Seeds "drink more" [have greater roots?] than Vegetables: Pesachim 39b
Ulshin: Pesachim 39a
Chazeres: Pesachim 39a
Tamcha: Pesachim 39a
Whether vegetables grow more from rain or from underground resources: Rosh HaShanah 14a; Kiddushin 3a
Vines
Elephants eat bundles of vines: Shabbat 128a
Willow
Differentiating between species of Willow: Succah 34a