Blackbrush, Coleogyne ramosissima, is easy to overlook. Its tiny, dark leaves and gray stems can make a stretch of landscape look at best boring, at worst funereal. But this rose family plant’s low, dense canopy helps shape desert plant communities, and gives desert animals an important food source. Nurse plants shelter vulnerable seedlings from heat, drying winds, and hungry animals. Blackbrush may well be the most important nurse plant for Joshua trees.

Long-lived adults, episodic seed production, rodent seed caches, and suppressed young plants help blackbrush stands persist. But blackbrush isn’t well adapted to what North America’s hot deserts have become. Research in the Panamint Mountains shows why rebuilding a mature desert shrub community can take far longer than replacing its individual plants.

Protecting existing blackbrush matters as warming and disturbance make natural recovery harder.

Also, you still have a few days left to apply for our Fellowship for Desert Reporting, viewable at https://thedamn.org/fellowship.

Sources cited, plus extras:
Webb, R. H., Steiger, J. W., & Turner, R. M. (1987).Dynamics of Mojave Desert Shrub Assemblages in the Panamint Mountains, California. Ecology, 68(3), 478–490. The exceptionally slow recovery of blackbrush communities after disturbance, including the climatic and geomorphic stability quotation. Free PDF. pubs.usgs.gov
Hunter, K. L., & McAuliffe, J. R. (1994).Elevational Shifts of Coleogyne ramossissima in the Mojave Desert during the Little Ice Age. Quaternary Research, 42(2), 216–221. Packrat midden evidence for blackbrush expansion at the southern Nevada study site during the Little Ice Age. The extra “s” in ramossissima appears in the published title. Cambridge Core
Meyer, S. E. (2023).Factors Regulating Population Stand Structure in Blackbrush (Coleogyne ramosissima: Rosaceae), a Masting North American Desert Shrub. Diversity, 15(5), 619. Stand structure, episodic seed crops, rodent dispersal, and banks of suppressed young plants within adult crowns. mdpi.com
Pendleton, B. K., & Meyer, S. E. (2004).Habitat-correlated variation in blackbrush (Coleogyne ramosissima: Rosaceae) seed germination response. Journal of Arid Environments, 59(2), 229–243. Differences among populations in seed chilling requirements and germination responses. . ScienceDirect
Jones, L. C., Schwinning, S., & Esque, T. C. (2014).Seedling ecology and restoration of blackbrush (Coleogyne ramosissima) in the Mojave Desert, United States. Restoration Ecology, 22(5), 692–700. Seedling establishment, herbivory, and how nurse-plant effects change with elevation and environmental stress.

 

Blackbrush, Coleogyne ramosissima, is easy to overlook. Its tiny, dark leaves and gray stems can make a stretch of landscape look at best boring, at worst funereal. But this rose family plant&rsquo;s low, dense canopy helps shape desert plant communities, and gives desert animals an important food source. Nurse plants shelter vulnerable seedlings from heat, drying winds, and hungry animals. Blackbrush may well be the most important nurse plant for Joshua trees.
Long-lived adults, episodic seed production, rodent seed caches, and suppressed young plants help blackbrush stands persist. But blackbrush isn&rsquo;t well adapted to what North America&rsquo;s hot deserts have become. Research in the Panamint Mountains shows why rebuilding a mature desert shrub community can take far longer than replacing its individual plants.
Protecting existing blackbrush matters as warming and disturbance make natural recovery harder.
Also, you still have a few days left to apply for our Fellowship for Desert Reporting, viewable at <a href="https://thedamn.org/fellowship">https://thedamn.org/fellowship</a>.
Sources cited, plus extras:
<ul>
<li>Webb, R. H., Steiger, J. W., &amp; Turner, R. M. (1987). <a href="https://doi.org/10.2307/1938453">Dynamics of Mojave Desert Shrub Assemblages in the Panamint Mountains, California</a>. Ecology, 68(3), 478&ndash;490. The exceptionally slow recovery of blackbrush communities after disturbance, including the climatic and geomorphic stability quotation. <a href="https://www.resolutionmineeis.us/sites/default/files/references/webb-steiger-turner-1987.pdf">Free PDF</a>. <a href="https://pubs.usgs.gov/publication/70014100">pubs.usgs.gov</a></li>
<li>Hunter, K. L., &amp; McAuliffe, J. R. (1994). <a href="https://faculty.salisbury.edu/~kxhunter/Taylor-Hunter_Lab/Publications/hunter.1994.pdf">Elevational Shifts of Coleogyne ramossissima in the Mojave Desert during the Little Ice Age</a>. Quaternary Research, 42(2), 216&ndash;221. Packrat midden evidence for blackbrush expansion at the southern Nevada study site during the Little Ice Age. The extra &ldquo;s&rdquo; in ramossissima appears in the published title. <a href="https://www.cambridge.org/core/journals/quaternary-research/article/abs/elevational-shifts-of-coleogyne-ramossissima-in-the-mojave-desert-during-the-little-ice-age/FEE620E10969CBB203103F891C576A34">Cambridge Core</a></li>
<li>Meyer, S. E. (2023). <a href="https://doi.org/10.3390/d15050619">Factors Regulating Population Stand Structure in Blackbrush (Coleogyne ramosissima: Rosaceae), a Masting North American Desert Shrub</a>. Diversity, 15(5), 619. Stand structure, episodic seed crops, <a href="https://www.mdpi.com/1424-2818/15/5/619">rodent dispersal, and banks of suppressed young plants within adult crowns.</a><a href="https://www.mdpi.com/1424-2818/15/5/619"> m</a><a href="https://www.mdpi.com/1424-2818/15/5/619?utm_source=chatgpt.com">dpi.com</a></li>
<li>Pendleton, B. K., &amp; Meyer, S. E. (2004). <a href="https://www.sciencedirect.com/science/article/abs/pii/S0140196304000382">Habitat-correlated variation in blackbrush (Coleogyne ramosissima: Rosaceae) seed germination response</a>. Journal of Arid Environments, 59(2), 229&ndash;243. Differences among populations in seed chilling requirements and germination responses.&nbsp;. <a href="https://www.sciencedirect.com/science/article/abs/pii/S0140196304000382">ScienceDirect</a></li>
<li>Jones, L. C., Schwinning, S., &amp; Esque, T. C. (2014). <a href="https://doi.org/10.1111/rec.12128">Seedling ecology and restoration of blackbrush (Coleogyne ramosissima) in the Mojave Desert, United States</a>. Restoration Ecology, 22(5), 692&ndash;700. Seedling establishment, herbivory, and how nurse-plant effects change with elevation and environmental stress.</li>
</ul>
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Join Chris Clarke and a variety of guests as they explore the challenges and opportunities of the American Southwest's fragile ecosystems. Engaging interviews with experts, activists, and advocates on conservation, land management, and environmental justice. Science and sentiment, politics and philosophy, hiking and history, culture and creativity all go into defending the desert. Be forewarned: We are out to recruit you to the cause.

Join Chris Clarke and a variety of guests as they explore the challenges and opportunities of the American Southwest's fragile ecosystems. Engaging interviews with experts, activists, and advocates on conservation, land management, and environmental justice. Science and sentiment, politics and philosophy, hiking and history, culture and creativity all go into defending the desert. Be forewarned: We are out to recruit you to the cause.

Vital info on protecting our irrepaceable deserts

90 Miles from Needles: the Desert Protection Podcast

90 Miles from Needles is a podcast about the environment, landscapes, and people of the American deserts—the Mojave, Sonoran, Chihuahuan, Great Basin and beyond. Host Chris Clarke explores desert ecology, wildlife, public lands, history, culture, road trips, conservation and the people working to protect these landscapes.

90 Miles from Needles is a podcast about the environment, landscapes, and people of the American deserts&mdash;the Mojave, Sonoran, Chihuahuan, Great Basin and beyond. Host Chris Clarke explores desert ecology, wildlife, public lands, history, culture, road trips, conservation and the people working to protect these landscapes.

Fire can erase blackbrush stands quickly, while invasive annual grasses can make subsequent fires more likely.