Oreocarya worthingtonii Sivinski
J. Bot. Res. Inst. Texas 17(1): 1–8 (2023)

Oreocarya HOME / INICIO

Pronunciation/Pronunciación:	O-re-o-cár-ya wor-thing-tò-ni-i
Etymology/Etimología:	after Richard D. Worthington, biology Professor Emeritus, University of Texas at El Paso.
Synonyms/Sinónimos:	None
Type/Tipo:	R.C. Sivinski 4746 (Holotype: UNM26389).     U.S.A. New Mexico: Otero Co.: mouth of Big Dog Canyon near the north foot of Brokeoff Mountains, 32 km N of Texas border and 11.7 km W of Eddy County line, T23S R19E Sec 23 NE¼ of SW¼, 15 Apr 1999,

Distribution/Distribución:
 
Oreocarya worthingtonii
Left: Data from SEINet. Right: Distribution map from Sivinski 2023.


Key to Oreocarya species with globular fruits and roughened nutlets from the northern Chichuahan Desert (from Sivinski 2023)

1. Flowers homostylous; corolla lobes white; corona of fornices narrowly erect at the corolla throat, yellow or ochroleucous.     2. Mid-cauline leaves narrowly oblanceolate, >2 mm wide; mature inflorescence usually elongate-interrupted, rarely subcapitate; nutlets tuberculate-rugose, 2.4–3.0 mm long ... O. oblata     2. Mid-cauline leaves linear or linear-oblanceolate, <2 mm wide; mature inflorescence terminal and subcapitate, occasionally with a reduced cymule at 1 or 2 additional nodes;         nutlets finely tuberculate, 2.0–2.4 mm long ... O. worthingtonii 1. Flowers heterostylous; corolla showy, lobes white with yellow bases; fornices at corolla throat with broadly rounded yellow bases extending to the lobe bases.     3. Inflorescence elongate-interrupted or subcapitate; corolla tube 10–12(14) mm; nutlets 2.7–3.0 mm long ... O. paysonii     3. Inflorescence terminally compact, nearly capitate; corolla tube 8–9 mm; nutlets 3.2–3.8 mm long ... O. crassipes

Holotype:

Oreocarya worthingtonii
R.C. Sivinski 4746, 15 April 1999 (UNM0026389=UNM110271). United States, New Mexico, Otero Co., Mouth of Big Dog Canyon near the north foot of Brokeoff Mountains.


Paratypes:

Oreocarya worthingtonii
R.C. Sivinski 4739, 14 April 1999 (UNM0026387=UNM111380). United States, New Mexico, Otero Co., Guadalupe Mountains, west side of Martine Ridge.



Oreocarya worthingtonii
R.C. Sivinski 4275, 21 Apr 1998 (SDSU24812)
United States, New Mexico, Otero County, Guadalupe Mountains, just W. of Eddy County line on rim of large unnamed canyon N. of Sixshooter Canyon, W-facing slope just N of powerline;
T25S R20E sec 13 NW¼ of NE¼. 32.1339, -104.852 1600 meters (5248ft) elevation


 
  
Oreocarya worthingtonii
R.C. Sivinski 4747, 15 Apr 1999 (SDSU24811)
United States, New Mexico, Otero, North foot of Brokeoff Mountains, 28.3 km N of Texas border and 14.3 km W of Eddy County line, T23S R19E Sec 33 SE1/4.
Nearly barren sandy limestone knoll. Sandy limestone.
32.2573, -105.0017 1240 meters (4067ft) elevation.




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