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Ephedra nevadensis S. Watson
NEVADA JOINTFIR
Life   Plantae   Gymnospermae   Ephedraceae   Ephedra


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FamilyScientific name @ source (records)
Berytidae  Neoneides muticus @ AMNH_IZC (1)
Botryosphaeriaceae  Sphaeropsis @ 366205B (1); 366205A (1)
Cicadellidae  Norvellina bicolorata @ UCR_ENT (8)
Cicadidae  Platypedia putnami @ CSUC_TCN (1)
Cronartiaceae  Peridermium ephedrae @ BPI (5)
Diaspididae  Pallulaspis ephedrae @ CSCA_TCN (1)
Miridae  Chlamydatus monilipes @ AMNH_PBI (2)

Coquillettia schwartzi @ AMNH_PBI (1)

Deraeocoris brevis @ AMNH_ENT (1)

Deraeocoris bullatus @ AMNH_ENT (1)

Hoplomachidea consors @ AMNH_PBI (5)

Lopidea bullata @ AMNH_PBI (2)

Lopidea nigridia @ AMNH_ENT (141)

Lopidea picta @ AMNH_PBI (1)

Megalopsallus ephedrae @ AMNH_PBI (1)

Megalopsallus froeschneri @ AMNH_PBI (2); AMNH_IZC (1)

Megalopsallus @ AMNH_PBI (13)

Nasocoris ephedrae @ AMNH_PBI (1)

Phytocoris becki @ AMNH_PBI (7); AMNH_ENT (79)

Phytocoris nigrolineatus @ AMNH_PBI (1)

Phytocoris ventralis @ AMNH_ENT (45)

Pruneocoris stonedahli @ AMNH_ENT (1)

Pseudopsallus mojaviensis @ AMNH_PBI (3)
Nogodinidae  Osbornia cornuta @ UCR_ENT (15)
Pseudococcidae  Anisococcus ephedrae @ CSCA_TCN (2)
Teichosporaceae  Teichospora megastega @ BPI (2)

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Following served from American Museum of Natural History, Plant Bug AMNH_PBI00304766 pbi_cal04l2h8
   
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Following modified from Flora of North America
   
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FNA | Family List | FNA Vol. 2 | Ephedraceae | Ephedra

8. Ephedra nevadensis S. Watson, Proc. Amer. Acad. Arts. 14: 298. 1879.

Nevada ephedra

Ephedra antisyphilitica S. Watson 1871, not Berlandier ex C. A. Meyer 1846; E . antisyphilitica S. Watson var. pedunculata S. Watson; E . nevadensis subvar. paucibracteata Stapf

Shrubs erect, 0.25--1.5 m. Bark gray, fissured. Branches alternate or whorled, rigid, angle of divergence about 45°. Twigs pale green, becoming yellow with age, not viscid, glaucous, with numerous longitudinal grooves; internodes 1--6 cm. Terminal buds conic, 1--3 mm, apex obtuse. Leaves opposite (rarely in whorls of 3), 2--4(--8) mm, connate to 1/2--3/4 their length; bases thickened, brown, completely deciduous; apex obtuse. Pollen cones 1--several at node, ellipsoid, 4--8 mm, sessile or on short peduncles with 2 pairs of basal bracts; bracts opposite, 5--9 pairs, yellow to light brown, obovate, 3--4 × 2--3 mm, membranous; bracteoles slightly exceeding bracts; sporangiophores 3--5 mm, exserted to 1/4--1/2 their length, with 6--9 sessile to short-stalked (less than 1 mm) microsporangia. Seed cones 1--several at node, nearly globose, 5--11 mm, on long peduncles, with 1--2 pairs of basal bracts; bracts opposite, 3--5 pairs, nearly circular, 4--8 × 3--6 mm, herbaceous, with light brown to yellow-green center, occasionally pinkish tinged, margins entire. Seeds (1--)2, ellipsoid, 6--9 × 2--4 mm, brown, smooth. 2 n = 14, 28.

Coning late winter--midspring. Dry, rocky slopes and hills, rarely in sandy flat areas; 700--1900 m; Ariz., Calif., Nev., Oreg., Utah.

Updated: 2024-04-13 16:17:02 gmt
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