YELLOW PITCHER PLANT Sarracenia flava
Sarracenia flava, the yellow pitcherplant, is a carnivorous plant in the family Sarraceniaceae. Like all the Sarraceniaceae, it is native to the New World. Its range extends from southern Alabama, through Florida and Georgia, to the coastal plains of southern Virginia, North Carolina and South Carolina. Populations also exist in the Piedmont and mountains of North Carolina.
Like other members of the genus Sarracenia, the yellow pitcher plant traps insects using a rolled leaf, which in this species is a vibrant yellow in color, and up to over a meter (3 ft) in height (although 50 cm, 20" is more typical). The uppermost part of the leaf is flared into a lid (the operculum), which prevents excess rain from entering the pitcher and diluting the digestive secretions within. The upper regions of the pitcher are covered in short, stiff, downwards-pointing hairs, which serve to guide insects alighting on the upper portions of the leaf towards the opening of the pitcher tube. The upper regions are also brightly patterned with flower-like anthocyanin markings, particularly in the varieties S. flava var. rugelii and S. flava var. ornata: these markings also serve to attract insect prey. The opening of the pitcher tube is retroflexed into a 'nectar roll' or peristome, whose surface is studded with nectar-secreting glands. The nectar contains not only sugars, but also the alkaloid coniine (a toxin also found in hemlock), which probably intoxicates the prey. Prey entering the tube find that their footing is made extremely uncertain by the smooth, waxy secretions found on the surfaces of the upper portion of the tube. Insects losing their footing on this surface plummet to the bottom of the tube, where a combination of digestive fluid, wetting agents and inward-pointing hairs prevent their escape. Some large insects (such as wasps) have been reported to escape from the pitchers on occasion, by chewing their way out through the wall of the tube.
In spring, the plant produces large flowers with 5-fold symmetry. The yellow petals are long and strap-like, and dangle over the umbrella-like style of the flower, which is held upside down at the end of a 50 cm, 20" long scape. The stigma of the flower are found at the tips of the 'spokes' of this umbrella. Pollinating insects generally enter the flower from above, forcing their way into the cavity between the petals and umbrella, and depositing any pollen they are carrying on the stigmata as they enter. The pollinators generally exit the flower, having been dusted with the plant's own pollen, by lifting a petal. This one-way system helps to ensure cross pollination.
The yellow pitcher plant is easy to cultivate, and is one of the most popular carnivorous plants in horticulture!
Hardiness zones: 6-10
Seeds per pack: 10
Germination: As with many perennials, these benefit from a period of moist cold to help them begin to grow. This is done by giving them a cool 'winter' period (artificial or natural), and then a warming to simulate 'spring', and time to grow! Here's how this can be done:
Obtain a planting container that has holes in the bottom for excess water to drain. Fill the container sphagnum peat moss, or a mix that contains mainly peat moss. Place the seeds on the surface of the pre-dampened mix, and gently water with a spray bottle. Cover with clear plastic, and place your container in a cool area (but not freezing) for 6 weeks. Once the cold period is completed, place the container at room temperature, and in bright light for them to germinate. Be sure to keep the soil moist during this entire germination period. Most seedlings will sprout within 2-3 months of the warming period, though some may take a little longer. Once plants sprout, slowly remove the plastic, a little bit each day. Always keep the soil slightly moist, never letting it dry out.
In the winter, plants need about 3 months dormancy period, to rest. If growing your plants indoors, place the pot in a cool location for this cold period.