Split the flowers/junglegrass/poisonivy components into separate folders,

leaving the plants folder as the primary API code and glue between them.  Any
of the three may be deleted to disable them if so desired.

poinsonivy/depends.txt

@@ -0,0 +1 @@
+plants

poinsonivy/init.lua

@@ -0,0 +1,69 @@
+-- This file supplies poison ivy for the plantlife modpack
+
+local spawn_delay = 2000 -- 2000
+local spawn_chance = 100 -- 100
+local grow_delay = 1000 -- 1000
+local grow_chance = 10 -- 10
+
+local verticals_list = {
+	"default:dirt",
+	"default:dirt_with_grass",
+	"default:stone",
+	"default:cobble",
+	"default:mossycobble",
+	"default:brick",
+	"default:tree",
+	"default:jungletree",
+	"default:coal",
+	"default:iron"
+}
+
+minetest.register_node(':poisonivy:seedling', {
+	description = "Poison ivy (seedling)",
+	drawtype = 'plantlike',
+	tile_images = { 'poisonivy_seedling.png' },
+	inventory_image = 'poisonivy_seedling.png',
+	wield_image = 'poisonivy_seedling.png',
+	sunlight_propagates = true,
+	paramtype = 'light',
+	walkable = false,
+	groups = { snappy = 3, poisonivy=1 },
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node(':poisonivy:sproutling', {
+	description = "Poison ivy (sproutling)",
+	drawtype = 'plantlike',
+	tile_images = { 'poisonivy_sproutling.png' },
+	inventory_image = 'poisonivy_sproutling.png',
+	wield_image = 'poisonivy_sproutling.png',
+	sunlight_propagates = true,
+	paramtype = 'light',
+	walkable = false,
+	groups = { snappy = 3, poisonivy=1 },
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_node(':poisonivy:climbing', {
+	description = "Poison ivy (climbing plant)",
+	drawtype = 'signlike',
+	tile_images = { 'poisonivy_climbing.png' },
+	inventory_image = 'poisonivy_climbing.png',
+	wield_image = 'poisonivy_climbing.png',
+	sunlight_propagates = true,
+	paramtype = 'light',
+	paramtype2 = 'wallmounted',
+	walkable = false,
+	groups = { snappy = 3, poisonivy=1 },
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "wallmounted",
+		--wall_side = = <default>
+	},
+})
+
+spawn_on_surfaces(spawn_delay, "poisonivy:seedling", 10 , spawn_chance/10, "default:dirt_with_grass", {"group:poisonivy","group:flower"}, poisonivy_seed_diff, 7)
+grow_plants(spawn_delay, grow_chance,   "poisonivy:seedling", "poisonivy:sproutling", nil, {"default:dirt_with_grass"})
+grow_plants(spawn_delay, grow_chance*2, "poisonivy:climbing", nil,                    nil, nil)
+
+enabled_poisonivy = true