En Español

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.

Help us grow by giving to the Plant Database Fund or by becoming a member

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.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

rate this answer
Not Yet Rated

Tuesday - August 16, 2005

From: Cosby, TN
Region: Southeast
Topic: Plant Identification
Title: Smarty Plants on cross pollination
Answered by: Nan Hampton and Joe Marcus


I live in Cosby, TN in the foothills of the Great Smoky Mountains National Park. I plant native species of wildflowers and shrubs. My question to you is: I planted cucumbers in raised beds next to the woods. When I went out to pick some cucumbers I noticed a small replica of the cucumber plant growing right in with them. This plant has a small 5 petal yellow flower which turns into a small green fruit (?) and grows on a vine that is a rapid grower. The leaves are staggered on each side of the vine (not across from each other). Will this plant cross-pollinate with my cucumbers? Is this plant poisonous? I've been eating my cucumbers and nothing has happened to me yet. I would like to hear from you regarding my questions. Thank you.


Your plant sounds like Meloncito (Melothria pendula), a member of the Family Cucurbitaceae (Cucumber Family). Other common names are Creeping cucumber or Speckled gourd. More pictures appear in the Missouri Plants database. If you would like to verify that this is your plant, you can send us a digital photo. Visit the Ask the Expert page and follow the instructions under "Plant Identification."

The Poisonous Plants of North Carolina database lists it as mildly toxic--the fruit is listed as a strong laxative. Melothria is very unlikely to cross with your cucumber; intergeneric hybrids are extremely rare. Further, even if it did cross with your cucumber, the fruit of the current generation would not be affected at all and would be completely safe to eat. Only the progeny of the cross would exhibit any characteristics of the male parent plant. So, unless you collect the seeds to replant next year or let the fruits fall for their seeds to germinate next year, you won't have a problem.

A bigger concern could be the possibility of vectoring a cucurbit virus to your garden plants. There is a virus called Melothria Mottle Virus that is hosted by Melothria plants and to which plants in the Cucumis genus (cucumbers) are susceptible. Although not too likely to happen, this virus could potentially affect your garden cucumbers, so it would probably be a good idea to keep the plants from close proximity.

More Plant Identification Questions

Mystery plant in hay fields in Tennessee
July 13, 2008 - I found plants growing in my hay fields that are about 4 feet tall, large leaves and blooms (ball shaped) bell flowers.That is, the blooms looks like a pom pom with about 50 to 80 small flowers "hang...
view the full question and answer

Clarification for botanical (Latin) names for Herbertia
June 17, 2010 - I am looking for a clarification of scientific names. In the classic wildflower book 'Wildflowers of Texas' the author, Geyata Ajilvsgi, attributes the plant Herbertia with the name Alophia drummon...
view the full question and answer

Plant identification
June 29, 2010 - I live outside of Cincinnati and I have a bush that has long yellowish leaves that grow like a spider plant. Just recently long purple things have grown in the middle of them. Is this normal or should...
view the full question and answer

Identity of a pink-flowering bush with flowers like sweet peas
June 29, 2012 - I have found a pink flowering small tree / bush that has picky branches kind of looks like sweet pea flowers and the leaves kind of look like shumac. Growing near the thick woods of northern MI
view the full question and answer

Plant identification in Michigan
May 26, 2010 - We are trying to identify a plant in our yard. It is seven inches tall in May, grows to about knee high, has red leaves, flowers in late June, early July. The flower is light pink. It is a perennia...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
© 2016 Lady Bird Johnson Wildflower Center