Pine Worksheet Slides

This file is to help you examine the details of the life history of the genus Pinus.

The slides are in the order of the worksheet

Pinus resinosa needle cross section low magnification:

Pinus resinosa needle cross section medium magnification:

Pinus resinosa needle cross section high mangnification of epidermal + mesophyll region:

Pinus resinosa needle cross section high magnification of endodermal region:

Pinus resinosa needle cross section high magnification of vascular region:

Young Pinus stem cross section low magnification with surrounding needles:

Young Pinus stem cross section medium magnification of vascular area:

Young Pinus stem cross section high magnification with vascular bundles:

Maturing Pinus stem cross section very low magnification:

Maturing Pinus stem cross section low magnification:

Maturing Pinus stem cross section high magnification outer region:

Maturing Pinus stem cross section high magnification cambial area:

Maturing Pinus stem cross section low magnification pith to periderm:

Maturing Pinus stem cross section very high magnification at growth ring border:

Young Pinus root cross section low magnification:

Young Pinus root cross section high magnification cambial zone:

Microsporangiate Pinus strobilus longitudinal section low magnification:

Microsporangiate Pinus strobilus longitudinal section high magnification:

Microsporangiate Pinus strobilus cross section low magnification with axis:

Microsporangiate Pinus strobilus cross section medium magnification highlighting attachment:

Microsporangiate Pinus strobilus cross section high magnification:
Note: In photo below, the sporophyll attachment is at a space between the stem vascular bundles...
as in ferns

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Microsporangiate Pinus strobilus cross section very high magnification:

Mature Pinus pollen grains whole mount high magnification:

Mature Pinus pollen grains whole mount very high magnification:

Mature Pinus pollen grains whole mount veru high magnification:

Pollination stage (Spring 1) Megasporangiate Pinus cone longitudinal section medium magnification:

Pollination stage (Spring 1) Megasporangiate Pinus cone longitudinal section high magnification:

Young (Summer 1) Megasporangiate Pinus cone longitudinal section low magnification:

Young (Summer 1) Megasporangiate Pinus cone longitudinal section medium magnification:

Young (Summer 1) Megasporangiate Pinus cone longitudinal section high magnification:

Second Year (Spring 2) Megasporangiate Pinus cone longitudinal section low magnification:

Second Year (Spring 2) Megasporangiate Pinus cone longitudinal section medium magnification:

Second Year (Spring 2) Megasporangiate Pinus cone longitudinal section medium magnification (cropped and reframed):

Megagametophyte of Pinus longitudinal section with archegonium and egg medium magnification:

Megagametophyte of Pinus longitudinal section with archegonium neck area high magnification:

Megagametophyte of Pinus longitudinal section with archegonium and egg high magnification:

Megagametophyte of Pinus longitudinal section with archegonia and eggs medium magnification:

Pinus proembryo with suspensors longitudinal section low magnification:

Pinus proembryo with suspensors longitudinal section medium magnification:

Pinus proembryo with suspensors longitudinal section high magnification:

Pinus mature seed longitudinal section very low magnification:

Pinus mature seed longitudinal section low magnification radicle area:

Pinus mature seed longitudinal section low magnification axis area:

Pinus mature seed longitudinal section low magnification cotyledon area:

Changing orientation of slide to make the embryonic axis vertical...
Pinus mature seed longitudinal section medium magnification cotyledon area:

Pinus mature seed longitudinal section high magnification cotyledon area:

Pinus mature seed longitudinal section medium magnification cotyledonary base area:

Pinus mature seed longitudinal section high magnification cotyledonary base area: