(a) A pollen grain containing the two sperm cells. It produces a pollen tube, which arrives at the ovule. After the arrival, one of the synergid cells degenerates and the pollen tube bursts to ...

I HAVE noticed a curious fact in reference to the blue gentian of the garden here that will interest you. This flower (like the daisy) closes at night and opens in the morning, and is exquisitely ...

Brightly colored annual flowers are popping up around the metro area. Annuals are an easy way to provide color with little care, but you’ll get the most from your plants if you give them a little ...