Showing posts with label Darwin. Show all posts
Showing posts with label Darwin. Show all posts

Thursday, October 31, 2013

365 Days of Floral Education - Days 351 - 355

As part of our 125th Anniversary celebration at Stein Your Florist Co. we are sharing a year of floral education, November 1, 2012 thru October 31, 2013. Each day we will post something new on our Facebook page to share our knowledge of our favorite things, flowers and plants and we'll be updating our blog every 5 days or so. No need for pencils and notebooks, just sharing some simple lessons in floristry.

Day 351 – Charles Darwin, in his interesting work on "Cross and Self-fertilization in the Vegetable Kingdom," gives some interesting particulars of the ingenious way in which bumble-bees obtain the honey from the snap-dragon when they cannot push past the projecting lip: "In Antirrhinum majus one or two holes had been made on the lower side, close to the little protuberance which represents the nectary, and therefore directly in front of and close to the spot where the nectar is secreted." In experiments, Mr. Darwin found that while fifty seed-pods protected by a net gave nearly ten grains of seed, a similar number of pods from plants that the bumble-bees had free access to yielded over twenty-three grains of seed. It is not, however, by piercing holes in the flower that the bees effect fertilization, but by thrusting their way through the jaws of the dragon into the throat, where they encounter the stamens, and becoming dusted with pollen, leave some of it on the stigma of that or the next flower they enter in like manner.

Day 352 – The blub of some muscari, or grape hyacinth, varieties is poisonous. It contains a substance called comisic acid, which is said to act like saponin. Although poisonous, saponins are poorly absorbed by the human body and so most pass through without harm. Saponins are quite bitter and can be found in many common foods such as some beans. They can be removed by carefully leaching the seed or flour in running water. Thorough cooking, and perhaps changing the cooking water once, will also normally remove most of them. However, it is not advisable to eat large quantities of food that contain saponins. Saponins are much more toxic to some creatures, such as fish, and hunting tribes have traditionally put large quantities of them in bodies of water in order to stupefy or kill the fish.

Day 353 – A few species of Muscari flowers, including M. comosum, can be used to make wine that is high in antioxidants and vitamin C. In addition, some homeopathic remedy practitioners crush the bulbs to create a form of poultice for irritated or red skin. Other practitioners also boil the bulbs to make a diuretic tea.









Day 354 – At least one species of Muscari, M. comosum, has an edible bulb. This species, also called tassel grape hyacinth, cipollini, or edible muscari, is native to the Mediterranean area. Its bulb has flavors similar to garlic, leek, or onion, making it a popular addition to Mediterranean cooking. In addition, the flowers are often used by perfume manufacturers because they smell sweet.



Day 355 – Many parts of the Typha or Cattail plant are edible to humans. The starchy rhizomes are nutritious with a protein content comparable to that of maize or rice. They can be processed into a flour. They are most often harvested from late autumn to early spring. They are fibrous, and the starch must be scraped or sucked from the tough fibers. Plants growing in polluted water can accumulate lead and pesticide residues in their rhizomes, and these should not be eaten.

Wednesday, October 2, 2013

365 Days of Floral Education - Days 326- 330

As part of our 125th Anniversary celebration at Stein Your Florist Co. we are sharing a year of floral education, November 1, 2012 thru October 31, 2013. Each day we will post something new on our Facebook page to share our knowledge of our favorite things, flowers and plants and we'll be updating our blog every 5 days or so. No need for pencils and notebooks, just sharing some simple lessons in floristry.

Day 326 – We know that leaves get their green color from chlorophyll, but sometimes leaves appear red, such as on a Japanese maple, or have variations of color throughout the leaves, such as croton plants, so where does this come from? Most plants have other pigments:  carotenoids, which appear yellow to orange, and anthocyanins, which range from red to purple, and these pigments may dominate the appearance of the green chlorophyll. So chlorophyll is still present and at work, its color is simply masked.

Day 327 – Flowers began changing the way the world looked almost as soon as they appeared on Earth about 130 million years ago, during the Cretaceous period. That's relatively recent in geologic time: If all Earth's history were compressed into an hour, flowering plants would exist for only the last 90 seconds. But once they took firm root about 100 million years ago, they swiftly diversified in an explosion of varieties that established most of the flowering plant families of the modern world.

Day 328 - Today flowering plant species outnumber by twenty to one those of ferns and cone-bearing trees, or conifers, which had thrived for 200 million years before the first bloom appeared. As a food source flowering plants provide us and the rest of the animal world with the nourishment that is fundamental to our existence. In the words of Walter Judd, a botanist at the University of Florida, "If it weren't for flowering plants, we humans wouldn't be here."

Day 329 - Botanists call flowering plants angiosperms, from the Greek words for "vessel" and "seed." Unlike conifers, which produce seeds in open cones, angiosperms enclose their seeds in fruit. Each fruit contains one or more carpels, hollow chambers that protect and nourish the seeds. Slice a tomato in half, for instance, and you'll find carpels. These structures are the defining trait of all angiosperms and one key to the success of this huge plant group, which numbers some 235,000 species.

Day 330 - Just when and how did the first flowering plants emerge? Charles Darwin pondered that question, and paleobotanists are still searching for an answer. Throughout the 1990s discoveries of fossilized flowers in Asia, Australia, Europe, and North America offered important clues. At the same time the field of genetics brought a whole new set of tools to the search. As a result, modern paleobotany has undergone a boom not unlike the Cretaceous flower explosion itself. We are learning more about flowering plants all the time.