Host an Event Volunteer Join Tickets

Support the plant database you love!

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

Sunday - December 22, 2013

From: Austin, TX
Region: Southwest
Topic: General Botany, Trees
Title: Are leaf margins of Chilopsis linearis toothed from Austin
Answered by: Barbara Medford

QUESTION:

Are the leaf margins of Chilopsis linearis, Desert Willow, smooth or toothed? The NPIN descrip says willow-like. Most willows have toothed leaf margins. Thank you.

ANSWER:

Chilopsis linearis (Desert willow) belongs to the Acanthaceae (Acanthus) family and is therefore not even closely related to the plants commonly referred to as willow, which are members of the Salicaceae (Willow) family.

If you follow this plant link, Chilopsis linearis (Desert willow), to our webpage on this plant, scroll down to "Plant Characteristics" you will find this leaf description:

"Leaf Shape: Lanceolate , Linear
Leaf Venation: Pinnate
Leaf Pubescence: Glabrous
Leaf Margin: Entire"

Although Mr. Smarty Plants has studied plant descriptions in classes at the Wildflower Center, they are still confusing to this member of the Smarty Plants Team. So, we went to this Garden Web Glossary of Botanical Terms (Republished in GardenLife Pro Glossary of Botanical Terms) and found these definitions of those terms:


"lanceolate
Shaped like a lance-head, several times longer than wide, broadest above the base and narrowed to the apex."
"linear
Long and narrow with parallel margins."
"pinnate
Consisting of several leaflets arranged on each side of a common petiole or rachis on a compound leaf or frond. 2. The feather vein pattern of simple leaves."

"glabrous
Smooth; not rough, pubescent, or hairy."

"entire
Without toothing or division."

It would appear that the last term answers your question; no teeth. Describing something as "willow-like" often refers to something long, tall and thin. If you ever read those old paperback detective books, there nearly always seemed to be a "long, tall, willowy blond." Teeth in mouth, but not on edges.

Since the Chilopsis linearis (Desert willow) is deciduous, and this is December, we could not go out in the garden and personally examine any leaves of the Desert Willow. Most willows are non-native to North America, and thus do not appear in our Native Plant Database. However, we did find a native, Justicia americana (American water-willow), that had this leaf description:

"Leaf Shape: Linear
Leaf Venation: Pinnate
Leaf Pubescence: Glabrous
Leaf Margin: Entire"

Sound familiar?

You should note that the the traditional willow belongs to the genus Salix  (willow). The Desert Willow is in the Chilopsis genus. There are 55 members of the genus Salix in our Native American Database. but a quick look did not produce any leaf descriptions on those. However, when we searched on "salix" in Wikipedia, we found this description: "The leaves are typically elongated, but may also be round to oval, frequently with serrated margins." Serrated could probably mean it has a toothy edge, but we should not expect the same from a totally different plant that just happens to share a common name.
 

From the Image Gallery


American water-willow
Justicia americana

Desert willow
Chilopsis linearis

More Trees Questions

Tool for removing live oak root shoots in Gonzales TX
August 09, 2010 - I've read your answer to live oak root shoots. You said to get rid of them by going 2 to 4 inches below the surface and cutting them. What tool is best for this shoot removal? I'm getting very tir...
view the full question and answer

Diagnosis of problem with Parsley hawthorn
August 06, 2007 - I have a Crataegus marshallii (Parsley hawthorn) that is about 3 years old. It leafed out this spring and flowered lightly. As the summer has progressed, though, the leaves have been dropping premat...
view the full question and answer

Sudden death of Texas Mountain Laurel
April 14, 2008 - Last year, my 15-year-old Mountain Laurel died very suddenly. The leaves began to curl up and turn brown, and it was dead within about 15 days. What happened?
view the full question and answer

Sudden death of one side of Mountain Laurel from Canyon Lake TX
July 22, 2013 - Hello! We live in Canyon Lake TX and have a Mountain Laurel that is in distress. It is planted in an irrigated flower bed and has been happily growing for 5 years. It is about 5' tall and has sever...
view the full question and answer

Fast growing non-invasive flowering tree from Carlsbad CA
April 17, 2013 - Looking for fast growing flowering tree with non-invasive roots.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.