Photo by Melody

PlantFiles: Straggler Daisy, Prostrate Lawnflower, Hierba del caballo, Horseherb
Calyptocarpus vialis

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Calyptocarpus (kal-ip-toe-KAR-pus) (Info)
Species: vialis (VEE-uh-lis) (Info)

Synonym:Synedrellopsis grisebachii
Synonym:Synedrella vialis

8 members have or want this plant for trade.


under 6 in. (15 cm)
6-12 in. (15-30 cm)

24-36 in. (60-90 cm)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Partial to Full Shade


Bloom Color:
Bright Yellow

Bloom Time:
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter

Grown for foliage

Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
By simple layering

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds

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to view:

By Wingnut
Thumbnail #1 of Calyptocarpus vialis by Wingnut

By SShurgot
Thumbnail #2 of Calyptocarpus vialis by SShurgot

By SShurgot
Thumbnail #3 of Calyptocarpus vialis by SShurgot

By Jeff_Beck
Thumbnail #4 of Calyptocarpus vialis by Jeff_Beck

By Jeff_Beck
Thumbnail #5 of Calyptocarpus vialis by Jeff_Beck

By htop
Thumbnail #6 of Calyptocarpus vialis by htop

By frostweed
Thumbnail #7 of Calyptocarpus vialis by frostweed

There are a total of 11 photos.
Click here to view them all!


4 positives
2 neutrals
4 negatives

Gardeners' Notes:

Neutral chuck7701 On May 29, 2014, chuck7701 from McKinney, TX (Zone 8a) wrote:

Should be considered invasive if trying to grow other grasses in sunny areas of your yard. Easily controlled with a light spray of general herbicide like Weed B Gone in areas that it it invades or is not wanted. Pulling and digging it are not an option in the yard once established - gardens and beds, yes.

That being said, it does make a good drought tolerant ground cover in shaded areas where nothing else will grow. Can crowd out St. Augustine and Bermuda if unchecked or not mowed.

Positive afr On Feb 18, 2014, afr from Dallas, TX wrote:

Yes, this plant can be aggressive--because it is so happy in its native habitat. Still, it's hard to argue with a native plant that thrives without any special care or fuss. It is drought-tolerant, shade-tolerant, and can even take light foot traffic. It can also be mowed for use as a lawn substitute ground cover. As for controlling its aggressive habit, simply use a small garden tool to remove unwanted plants by digging up the central root of each individual plant. The bare root plants are easy to transplant and re-establish elsewhere.

Negative Super65 On Oct 13, 2013, Super65 from Belton, TX wrote:

Extremely invasive weed. I had never seen it before until a couple of years ago, when some came up in a shady area of the yard under a hackberry tree where grass wouldn't grow very well, so I left it alone. If it would have stayed there, there'd be no problem. Now it is EVERYWHERE, in all my beds, taking over the lawn even in sunny places of established grass. It is very hard to pull up all of the root, so it keeps coming back ten fold. It's taking over.

Positive mocarter On Oct 29, 2012, mocarter from Abilene, TX wrote:

All 10 years we have lived in our house have been drought years so watering grass has simply not been something we've been willing to do though having more than dirt is certainly desirable. This little ground cover started under a mullberry tree in our front yard and has now almost worked its way around our entire yard, front and back. It keeps the yard colorful with its nice green foliage and tiny yellow flowers. No more problem keeping it out of where it's not wanted than would be grass. I love it!

Negative dmtom On Aug 27, 2010, dmtom from Deep South, TX (Zone 9b) wrote:

I thought it would be a good ground cover till I found out where all those little burrs were comming from in the winter. They stick to the bottom of your shoes and you track them eveywhere, cars, house, office etc.

Negative vossner On Aug 19, 2010, vossner from Richmond, TX (Zone 9a) wrote:

I consider this a weed in my garden. Grows in moist areas and spreads at lightning speed. Extremely hard to remove and chokes out desirable plants.

Negative Mom2Layla On Nov 10, 2009, Mom2Layla from La Marque, TX wrote:

This little nuisance is trying to take over everything! And it is a pain to pull up!! It's now trying to outgrow my St. Augustine!

Positive cedarcrone On Jan 28, 2009, cedarcrone from Rockport, TX (Zone 9a) wrote:

This is a great groundcove for the shade here in 9a; I wish I could buy seeds to sow where it hasn't covered yet. I would like to replace the St. Augustine grass with it; it doesn't need mowing nor watering. Stays green most of the year. So far it's easy to keep out of the flower beds; just pull it out and plant it elsewhere.

Positive frostweed On Nov 27, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Straggler Daisy, Prostrate Lawnflower, Hierba del caballo, Horseherb Calyptocarpus vialis is Naturalized in Texas and other States.

Neutral Wingnut On May 30, 2002, Wingnut from Spicewood, TX (Zone 8b) wrote:

I like this little native Texan. It forms a nice clump of small yellow flowers amid small, green leaves. Tough little plant. If allowed to lean on or "climb" up something, as in the first photo above, it can reach a foot or so tall. Drought tolerant. Could be considered invasive if not kept in check.


This plant has been said to grow in the following regions:

Brooksville, Florida
Abilene, Texas
Arlington, Texas
Austin, Texas (3 reports)
Belton, Texas
Boerne, Texas
Canyon Lake, Texas
Clute, Texas
Dallas, Texas
Euless, Texas
Fort Worth, Texas (2 reports)
Georgetown, Texas
Haltom City, Texas
Harlingen, Texas
Hondo, Texas
Huntsville, Texas
La Marque, Texas
Liberty Hill, Texas
Lumberton, Texas
Magnolia, Texas
Mc Kinney, Texas (2 reports)
Richmond, Texas
Rockport, Texas
San Antonio, Texas (3 reports)
Spicewood, Texas

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