Native Plants
Q. Who is Mr. Smarty Plants?
A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
rate this answer
Monday - June 25, 2007
From: Prairieville, LA
Region: Southeast
Topic: Poisonous Plants
Title: Toxicity of Lupinus ssp. (bluebonnets)
Answered by: Nan Hampton
QUESTION:
Are bluebonnets toxic to cattle?ANSWER:
There are six species native to Texas that are known as bluebonnets (all designated as the Official State Flower): Lupinus subcarnosus, L. texensis, L. havardii, L. concinnus, L. plattensis, and L. perennis. In general, many species of Lupinus are called bluebonnets and most of those are considered toxic. In particular, the seeds are the culprits with high levels of alkaloids. Lupinus latifolius (broadleaf lupine) and the alkaloid anagyrine contained in its seeds (when eaten by a pregnant cow) is implicated in causing crooked calf disease. The Canadian Poisonous Information System lists symptoms of poisoning by Lupinus sericeus (silky lupine) for cattle, sheep, and horses. Montana Plant Life lists Lupinus arbustus ssp. calcaratus (longspur lupine) and Lupinus argenteus (silvery lupine), as well as L. sericeus, as having poisonous leaves and seeds.L. perennis (listed as toxic by the Poisonous Plants of Pennsylvania database) is the only member of the genus native to Louisiana or Texas specifically designated as poisonous. In fact, the Texas Toxic Plant Database, based on the book, Toxic Plants of Texas by Charles R. Hart and others from the Texas Cooperative Extension Service of Texas A&M University, does not list any lupines at all. This suggests that poisoning by lupines in Texas and Louisiana (which share many of the same species of Lupinus) is not a serious problem. Nevertheless, Poisonous Plants of North Carolina lists all Lupinus species as toxic if large quantities of seeds are eaten. If cattle are kept in an area where there is little forage except bluebonnets with many mature seed pods, there could be serious concern about risk of poisoning.
More Poisonous Plants Questions
Laws pertaining to sale of poisonous plants
May 05, 2009 - Are there any laws pertaining to the sale of poisonous plants. do they have to be labeled as poisonous by law?
view the full question and answer
Are bald cypress cones toxic to dogs?
October 27, 2013 - Are bald cypress tree seed pods poisonous? to dogs? We just got a rescue dog and we go out in the yard with her. But now that we are into fall and the pods are falling. She goes right to them. Are...
view the full question and answer
Cutting back non-native oleanders affected by freeze in Austin
January 30, 2010 - After the last hard freeze makes my oleanders look dead. Can I cut them down to the ground this time of year?
view the full question and answer
How to Control Poison Ivy
February 22, 2016 - We have lots of Poison Ivy on a site we are clearing it is adjacent to a pond and children are around this area all the time. We are creating hiking paths. I have a lot of experience but I do not wan...
view the full question and answer
Poisonous plants of Texas Bays and Estuaries
February 24, 2011 - What is a poisonous native plants of the Bay and Estuary system in Southeast Texas?
view the full question and answer
| Support the Wildflower Center by Donating Online or Becoming a Member today. |