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The male cones are slender conic, 5–11 cm (2.0–4.3 in) long and 1–2 cm (0.39–0.79 in) broad and reddish-brown in colour and are lower on the tree than the seed cones. [3] Seedlings appear to be slow-growing [3] and mature trees are extremely long-lived; some of the older individuals today are estimated to be between 500 and 1,000 years old.
A seedling is a young sporophyte developing out of a plant embryo from a seed. Seedling development starts with germination of the seed. A typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (embryonic shoot ), and the cotyledons (seed leaves).
The seeds of the pinyon pine, known as "pine nuts" or "piñóns", are an important food for American Indians living in the mountains of the North American Southwest. All species of pine produce edible seeds, but in North America only pinyon produces seeds large enough to be a major source of food.
Pinus remota, commonly known as the Texas pinyon or papershell pinyon, is a pine in the pinyon pine group, native to southwestern Texas and northeastern Mexico.It can be distinguished from other pinyon species by its thin-walled seeds, which made it especially attractive as a food to Indians and Mexicans living where it grew.
Pine trees are usually better adapted to a sandy or sandy loam soil, [9] while white spruce trees and fir trees, such as the Douglas fir, prefer fine-texture loams and clay loam soils. [9] Some trees grow well in all types of soil, but in any case, the land must be well-drained for a Christmas tree farm to have a chance of thriving. [9]
Pinus rigida, the pitch pine, [2] [3] is a small-to-medium-sized pine. It is native to eastern North America , primarily from central Maine south to Georgia and as far west as Kentucky. It is found in environments which other species would find unsuitable for growth, such as acidic, sandy, and low-nutrient soils.
Casuarina equisetifolia, commonly known as coastal she-oak, horsetail she-oak, [3] ironwood, [4] beach sheoak, beach casuarina, whistling tree [5] or Australian pine [6] is a species of flowering plant in the family Casuarinaceae and is native to Australia, New Guinea, Southeast Asia and India.
The cones are borne on a short stem, and have two to four scales, usually only one (sometimes two) fertile, each fertile scale bearing a single apical seed 10–15 mm. When mature, the scales swell up and become reddish purple, fleshy, and berry-like, 10–20 mm long; they are then eaten by birds, which disperse the seeds in their droppings.