B. Papp szerk.: Studia Botanica Hungarica 34. 2003 (Budapest, 2003)

Debreczy, Zsolt; Rácz, István: A re-assessment of the new taxa of firs (Abies Mill.) reported from Mexico in 1995

as "CITIES I" and distinguished from Abies religiosa (H., B. et K.) Schltdl. et Cham., frequent in the area. Participants in field work: Dr Gyöngyvér Biró, Dr Zsolt Debreczy, Dr István Rácz (IDRI and Hung. Nat. Hist. Museum, Budapest, Hungary), Éva Kertész (Botanical Collection, Munkácsy Mihály Múzeum, Békéscsaba, Hungary), Yinghao Zhao (Botanical Garden of the Chinese Academy of Sciences, Beijing, P. R. China). 5. Abies lowiana (Gord.) A. Murr. var. viridula Debreczy et Rácz, "Abies E" in News Brief (IDRI) No. 6 (Sep. 1994); Fig. 3 in the present article. - TYPUS: Mexico. Chihuahua: Sierra Madre Occidental, near Ciudad Madera, 2,700 m, May 6, 1994, Debreczy, Biró, Rácz et al. # 39711 (Holotypus: BP; Isotypi: A, CHAP, E, MEXU, NA). A specie typica foliis ramulorum sterilium conspicue regulariter dichotomice ordinatis, in latere dorsali lucide viridibus; illis ramulorum fertilium prorsum directis et parum declinatis differt. Description: tree with straight, usually single trunk, loose conical crown, ascending and horizontally spreading, later slightly descending branches, with shiny light green foliage; bark: think, smooth, light grey in young age, later ruptured to irregular, thick plates; branches: brownish yellow, sporadically hairy up to 5-6 years; bud: ovate, thickly covered by resin; branchiets: yellowish green when mature, thinly pubescent with fine (0.08-0.13 mm long) brownish, faintly brownish or subclear hairs, often long pointed widened at their base; leaves: on stem "subdistichous", spreading, slightly forward directing (shade) or upcurving (exposed) at right angle, forming an open "U" on the upper (dorsal) side of the branchlets, slightly shorter when (in helical order) they reach or leave their uppermost position on the branchiets, 3-5 cm long, 2.2 mm wide, parallel sided, rounded (fertile) pointed or very finely (0.04 mm) emarginate on shade leaves; leathery, shiny dark green above with up to 10 stomatophorus lines all along on middle of leaves, their ventral side greenish gray with narrow (0.2-0.3 mm) green margins and wider midrib (0.5 mm), often with few broken lines of stomas and two broad silvery stripes, typically with 9 (in narrower shade leaves 4-6) stomatophorus lines with moderately densely set (9/mm), fine (0.03-0.04 mm), oval stomata; leaves in cross section elliptical, with 2 median resin canals; strobiles: female: 5-6 x 0.8 cm with first appressed, later reflexed, short (4x5 mm), rounded triangular; irregularly serrate bracts with slightly prominent tip of the bract-needle (midvein), pale green or less often reddish green; cones: not seen, cone scales regular, as in the species.