602 . Mr. Don on the Plant 



noso, cyathiformi, margine plicato, sublobulato. Slyli 

 complanati, leviter canaliculati, basi dilatati, subconnati 

 apice recurvati. Stigmata truncata. Fructus ellipticus, 

 a dorso vald^ compressus, margine complanato, latius- 

 culo cinctus : raphe angustissim^, ssep^ claus^. Achenia 2, 

 parallela, 5-costata ; costis intermediis 3, distinctis, filifor- 

 mibus, equidistantibus ; lateralibus 2 cum margine conflu- 

 entibus. Vallecula univittatae : vittis prominulis. Com- 

 missura plana, dilatata, 4-vittata, sulco levissimo medio 

 exarata. Columella filiformis, tenuissima, bipartita. Se- 

 men complanatum : albumen corneum, continuum, test^ 

 adhaerenti. 

 Herba (Persica) rohusta, glauco-viridis, radice perenni, pube 

 glandulosd vestita, facie ferS Opopanacis. Folia ampla, 

 petiolata, subbipinnata, bipedalia : pinnis subtrijugis, per 

 paria remotis : foliolis inferioribus distinctis ; superioribus 

 conjluentibus, inciso-pinnatifidis : segmentis oblongis, mucro- 

 nulatis, integerrimis, v. raro sublobatis, coriaceis, subtus ve- 

 nosis, 1 — 5-pollicaribus, semunciam v. 2 uncias latis. Petioli 

 cum rachide teretiusculi, costati, pubescentes, basi valdi dila- 

 tati, subvaginantes, margine superiore alato, stipulaceo. Um- 

 bella prolifera, racemosa. Umbellulae globosce, breviter pe- 

 dunculatce, spicato modo scepe disposita, pilorum lance minorum 

 instar. Pedunculi teretes, lanuginosi. Involucrum et In- 

 volucellum nulla. Petala alba. Stamina et Styli Jlava. 

 Ovaria densissime lanata. Fructus nudus. 



1. D. Ammoniacum. 

 Habitat circa pagum Jezd Khast in Persia meridionali. D. 

 Wright. % . (v. s. sp. in Mus. Soc. Linn.) 



The large cup-shaped epigynous disk, and the solitary resi- 

 niferous canals distinguish this genus from Ferula and Opopanas, 



to 



