Christmas tree

Farnsworth and Reed […] have reported on comparative reaction times to "Christmas tree" signal lights with respect to color deficiency. One of the most important color discriminations involved in the operation of a submarine is that of reading the "Christmas tree," a panel of 30 to 60 small jewel-shaped lights, used to indicate whether hull openings, such as hatches and vents, are sealed or not.

The existing ramp, the part that the B-52 used, a great amount of it was out in the alert area, on what we call a christmas tree^([sic]) stub at the end of the runway, in a dispersed posture.

At the eastern tip of the runway-taxiway lay the alert area for about nine aircraft, along with an alert building for the airmen to live. This area, called the "Christmas Tree" as a result of the Christmas tree shape of the runway pattern for alert aircraft, had compacted gravel base for concrete, but had not been paved.

The current alert area consists of a "Christmas Tree" configuration with alert parking stubs angled at 45° off of a central taxiway.

Then, after a smoky-burnout to warm up the tires, you're lined up next to another competitor and the Christmas tree lights blink down … yellow, yellow, yellow, green!

Wellheads, which support downhole tubing, casing, and other components, are connected at the top of wells to Christmas trees, which control production rates and fluid flows out of the well and may also direct fluids and equipment into the well

That or, in the name, something given a title to cover up the fact that all it was, was a football formation. But then the Christmas Tree came along.

We ended up inventing the Christmas tree formation. It came about as a practical necessity but it married perfectly to the philosophy of the president.

Even when Terry Venables' Christmas tree tactics has him playing with his back to goal, holding the ball up, taking a bruising from centre-backs, Shearer stays physically strong.

The Dennison Associates hold a Christmas Tree for Children and more than 300 little tots are entertained.

SYDNEY CHRISTMAS-TREE [running head] […] The shrub chosen as the Sydney "Christmas" is well worthy of the honour […] The flowers, which are irregularly star-shaped, […] continue increasing in size, and gradually ripening in tint, becoming first a pearl white, then palest blush, then pink, rose-colour, and crimson: the constant change taking place in them, and the presence of all these hues at one time on a spray of half a dozen flowers, has a singularly pretty appearance.

In summer, Nuytsia floribunda or WA [Western Australian] Christmas tree dot the roadsides and fields. Christmas trees have long been known to the Noongar people as moodjar, who say the trees hold the spirits of their ancestors. It blooms consistently October to December, signalling the arrival of Christmas, and is believed to be the largest parasitic tree in the world.

The moodjar (Nuytsia floribunda), also known as the Christmas tree because it flowers during the southern summer festive season, has roots that infect neighbouring trees.

Another interesting and characteristic tree confined to the province of Auckland is the pohutukawa (Metrosideros tomentosa) or Christmas tree of the settlers, so called from its blooming at the Christmas season and taking the place, in household decoration, of the berried mistletoe and holly.

Perhaps the most strikingly beautiful New Zealand flower is the pohutukawa (Metrosideros tomentosa), a close relation of the ratas. It, too, has brilliant red flowers, also spiky, and from their season of blooming it is sometimes called the Christmas-tree.

Metrosideros tomentosa (Myrtaceae), 47571. From Auckland, New Zealand. Seeds presented by Mr. James W. Poynton. "The Christmas tree of our early settlers; native name 'pohutukawa.' It comes into bloom mostly during the Christmas week (midsummer here). The flowers are deep red and the tree is very pretty when in flower.[…]" (Poynton.)

Remember the early, not too early, mornings when you went together down a cliff-side track to the little beach fringed with crimson-flowering pohutukawa—a Garden of Eden touch for southern eyes. […] Then the scramble up the track, glimpsing the dark-red Christmas tree blossoms against the sea's azure, to the relish of fried eggs and bacon and good strong tea, swallowed hot, cup after cup—before the new-fangled coffee sipping.

M. excelsa is a tree that is very significant to the history and people of New Zealand. […] [T]he New Zealand Christmas Tree’s Maori name of “Pohutukawa” translates closely to “head dress of red feathers” as the flowers according to legend were mistaken for feathers by a Maori chief[…].