E. MANAGEMENT CONSIDERATIONS 



This species has a broad distribution throughout the Northern 

 Hemisphere but is apparently nowhere common (Weber 1987) . Its 

 sole occurrence in the study area has not been relocated since 

 its discovery in 1986. Its occurrence near Ovando is also 

 apparently quite limited, found at only one of 115 ponds which 

 were searched. This species should be considered exceedingly 

 rare in Montana and should continue to be tracked by the 

 Montana Natural Heritage Program. Protection of the habitat 

 at the site should be a high priority for the BLM, since it 

 hosts several species of concern (see management concerns for 

 Agastache cusickii and Phacelia incana in this report) . 

 Designation of BLM sensitive status is appropriate. 



Lomatium attenuatum Evert 

 Tapertip biscuitroot 



A. DESCRIPTION ^ ^. * 



1. General description: This is a yellow flowered member of 

 the Apiaceae (carrot family) . The leaves are dissected and 

 have a sheathing petiole. The flowers are borne in a compound 

 umbel with an inconspicuous involucel subtending the umbelets. 

 The flowers are 5-merous except for the bicarpellate ovary. 

 The fruits are schizocarps which are flattened parallel to 

 their sutures, with low ribs on their faces. 



2. Technical species description (quoted from Evert 1983): 



Plant perennial, short-caulescent, with only one or two 

 cauline leaves, more or less scaberulous, (7-) 10-25 cm 

 tall, from an elongated thickened taproot and also 

 occasionally from a several-branched caudex; leaves 

 petiolate, 3-pinnate or ternately 3-pinnate, blades 2.0- 

 11 cm long, 1.5-10 cm wide, ovate in outline, the 

 ultimate divisions linear to oblanceolate, 2-5 mm long, 

 0.5-1.5 mm wide, obtuse to somewhat acute and mucronate; 

 petioles 1.5-5 cm long, the dilated and scarious 

 sheathing extending to the middle or above; peduncles 1- 

 3(4), scaberulous, exceeding the leaves in fruit, 10-15 

 cm long; involucre usually absent but occasionally 1 

 inconspicuous, filiform bract present; fertile rays 5-8, 

 spreading, angled, unequal, (1.5)3-5 cm long in fruit; 

 sterile rays 4-8 spreading, 3-10 mm long in fruit; 

 involucel absent or of 1-6 inconspicuous linear- 

 lanceolate, attenuate, non-connate bractlets, 1-4 mm 

 long; umbellets ca . 15-f lowered, only 2-6 developing into 

 fruit; pedicels 3-10 mm long in fruit; petals 1 . 5 mm long 

 including the incurved apex, yellow, obovate, glabrous; 

 styles 1-1.5 mm long, spreading or reflexed; ovaries 

 glabrous to slightly scaberulous; fruit oblong-elliptic, 

 glabrous, glossy, 5-8 mm long, 3-5 mm wide, the wings ca. 



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