Renée J. Rondeau (1,2,3), Thomas R. Van Devender (2), C. David Bertelsen (2,3), Philip D. Jenkins (3), Rebecca K. Van Devender (3), and Mark A. Dimmitt (2)
1 = Herbarium, Biology Dept., Colorado State University
2 = Arizona & Sonora Desert Museum
3 = Herbarium, Department of Plant Sciences, University of Arizona
*Ephedra nevadensis Wats. var. aspera (Engelm.)
L. Benson. [E. aspera Engelm.]. Mormon tea. Scattered shrub; common on
rocky
slopes and along washes, especially
near Safford Canyon; 685 & 1295 m (2250 & 4250 feet); February
& April.
*Ephedra trifurca Torr. Longleaf jointfir.
Scattered shrub; common on bajadas and along washes, especially in the
southern part of the
range; 715 & 885 m (2350 &
2900 feet); January & April.
Euphorbiaceae Spurge Family
*Acalypha neomexicana Muell. Arg.
Three & seeded mercury. Local annual; rare on rocky slopes in desertscrub
and desert grassland,
King Canyon, Hugh Norris and Sweetwater
trails; 1145 & 1370 m (3750 & 4500 feet); October & November.
*Bernardia incana Morton. Scattered
shrub; uncommon on steep rocky north slopes, mostly at higher elevations
in desertscrub and desert
grassland; 745 & 1430 m (2450
& 4700 feet); March & April, August & September.
*Ditaxis lanceolata (Benth.) Pax &
Hoffmann. [Argythamnia lanceolata (Benth.) Muell. Arg.]. Lanceleaf ditaxis.
Widespread herbaceous
perennial; uncommon on rocky slopes
and gravelly bajadas; 670 & 1325 m (2200 & 4350 feet); February
& May, August.
*Ditaxis neomexicana (Muell. Arg.)
Heller. [Argythamnia neomexicana Muell. Arg.]. Widespread annual or perennial
herb; common on
rocky slopes, gravelly bajadas, and
along washes in desertscrub and desert grassland; 640 & 1430 m (2100
& 4700 feet); February &
May, August & November.
*Euphorbia abramsiana L. C. Wheeler.
[Chamaesyce abramsiana (L. C. Wheeler) Burch.]. Spurge. Scattered annual;
very common in
wet summers on flats, bajadas, and
along washes, occasionally on rocky slopes; 640 & 730 m (2100 &
2400 feet); August & September.
+Euphorbia albomarginata T. &
G. [Chamaesyce albomarginata (T. & G.) Small.]. Rattlesnake weed. Local
herbaceous perennial; 10
miles west of Tucson in Avra Valley
(A. E. Garwood s.n. in March 1976); 825 m (2700 feet); March.
*Euphorbia arizonica Engelm. [Chamaesyce
arizonica (Engelm.) Arthur.]. Spurge. Widespread annual or perennial herb;
very common
on rocky slopes and along washes in
desertscrub and desert grassland; 670 & 1430 m (2200 & 4700 feet);
February & May, July &
December.
*Euphorbia capitellata Engelm. [Chamaesyce
capitellata (Engelm.) Millsp.]. Spurge. Widespread herbaceous perennial;
very common in
all communities; 655 & 1340 m
(2150 & 4400 feet); all year.
Euphorbia eriantha Benth. Desert poinsetta.
Scattered herbaceous annual or biennial; uncommon on rocky slopes and along
washes; 655
& 1310 m (2150 & 4300 feet);
February & March, June & August, November.
Euphorbia exstipulata Engelm. Spurge.
Local annual; uncommon on north slope near crest of Radio Towers Peak;
1325 m (4350 feet);
September.
*Euphorbia florida Engelm. [Chamaesyce
florida (Engelm.) Millsp.]. Spurge. Widespread annual; common on rocky
slopes, bajadas,
and along washes; 640 & 1310 m
(2100 & 4300 feet); August & November.
*Euphorbia gracillima Wats. [Chamaesyce
gracillima (Wats.) Millsp.]. Spurge. Scattered annual; common on bajadas
and along washes;
670 & 840 m (2200 & 2750 feet);
August & November.
*Euphorbia hyssopifolia L. [Chamaesyce
hyssopifolia (L.) Standl.]. Hyssop spurge. Scattered annual; uncommon on
rocky slopes,
gravelly bajadas, roadsides, and along
washes; 670 & 1130 m (2200 & 3700 feet); August & November.
*Euphorbia melanadenia Torr. [Chamaesyce
melanadenia (Torr.) Millsp.]. Spurge. Widespread herbaceous perennial;
very common on
rocky slopes in desertscrub and desert
grassland; 670 & 1430 m (2200 & 4700 feet); all year.
*Euphorbia micromera Boiss. [Chamaesyce
micromera (Boiss.) Wooton & Standley.]. Sonoran sandmat. Scattered
annual; uncommon
on sandy and gravelly flats and bajadas;
685 & 1175 m (2250 & 3850 feet); August & September.
*Euphorbia pediculifera Engelm. [Chamaesyce
pediculifera (Engelm.) Rose & Standl.]. Spurge. Widespread annual or
perennial herb;
uncommon to abundant on rocky slopes,
flats, roadsides, and along washes; 670 & 870 m (2200 & 2850 feet);
February & May, August
& November.
*Euphorbia polycarpa Benth. [Chamaesyce
polycarpa (Benth.) Millsp.]. Smallseed sandmat. Local annual or perennial
herb; uncommon
on sandy flats and roadsides, Sendero
Esperanza Trail and Sandario Road; 670 & 1005 m (2200 & 3300 feet);
April & August
(November).
Euphorbia prostrata Ait. [Chamaesyce
prostrata (Ait.) Small, E. chamaesyce L.]. Ground fig spurge. Local exotic
annual; rare, ASDM
and Oxbow Road; 715 & 870 m (2350
& 2850 feet); September & November.
+Euphorbia serrula Engelm. [Chamaesyce
serrula (Engelm.) Woot. & Standl.]. Sawtooth spurge. Local annual;
common on mesas,
Tucson (J. J. Thornber 47 and 8948
in 1903 & 1917) gravelly roadside 2 1/2 miles west of Tucson (F. W.
Gould 2552 in 1944); 730 m
(2400 feet); August & October.
*Euphorbia setiloba Engelm. [Chamaesyce
setiloba (Engelm.) Millsp. ex Parish.]. Bristlelobe sandmat. Widespread
annual; common on
rocky slopes, flats, bajadas, and
along washes in desertscrub and desert grassland; 670 & 1370 m (2200
& 4500 feet); (April) August &
November.
*Jatropha cardiophylla (Torr.) Muell.
Arg. Limber bush. Widespread shrub; very common on rocky slopes; 670 &
1310 m (2200 &
4300 feet); May & September.
*Poinsettia heterophylla (L.) Klotzsch
& Garcke var. heterophylla. [Euphorbia heterophylla L.]. Painted spurge.
Scattered annual;
uncommon on rocky slopes and along
washes in desertscrub and desert grassland; 730 & 1340 m (2400 &
4580 feet); August &
September.
*Tragia nepetaefolia Cav. Noseburn.
Scattered herbaceous perennial; uncommon on rocky slopes and along washes
in desertscrub and
desert grassland; 790 & 1430 m
(2600 & 4700 feet); April & May, August & November.
Fagaceae Beech Family
*Quercus turbinella Greene. Shrub
live oak. Local shrub; on north slopes in desert grassland, uncommon on
Radio Towers Peak,
common on Wasson Peak; 1160 &
1430 m (3800 & 4700 feet) (mostly above 4300 feet)); April.
Fouquieriaceae Ocotillo Family
*Fouquieria splendens Engelm. Ocotillo.
Widespread shrub; very common on gentle and steep rocky slopes in desertscrub
and desert
grassland; 640 & 1430 m (2100
& 4700 feet); flowers red, January & May (August & September,
November & December).
Fumariaceae Fumitory Family
+Corydalis aurea Willd. Golden
corydalis. Local annual or perennial herb; mesas, Tucson (J. J. Thornber
4003 in 1903), sandy wash
west of Tumamoc Hill (R. M. Turner
& J. E. Bowers 2224 in 1983); 745 m (2450 feet); March.