Manfreda, Salisbury, 1866

Castro-Castro, Arturo, Munguía-Lino, Guadalupe, Carrillo-Reyes, Pablo & Rodriguez, Aarón, 2017, Manfreda occidentalis (Agavoideae, Asparagaceae) a new species from western Mexico, Phytotaxa 321 (1), pp. 60-70 : 68-69

Key to the species of the genus Manfreda from western Mexico

1. Leaves succulent, 4–8 mm wide, with deltoid teeth on the margins................................................................................. M. brunnea

1. Leaves chartaceous, 0.5–2 mm wide, with erose margins..................................................................................................................2

2. Fruit protruding into the perigone tube as a dome or cone up to 3–5 mm long.................................................................................3

2. Fruit not protruding into the perigone tube or hardly so as a cone, up to 1 mm long........................................................................8

3. Corm 1.7–2 × 1–1.5 cm; perigone tube funnelform and curved 180°.......................................................................... M. singuliflora

3. Corm 2.9–13.5 × 1.4–5 cm; perigone tube cylindrical and straight or curved 20–45°......................................................................4

4. Leaves lanceolate-elliptic, frequently variegate; inflorescence rachis 2.3–14 cm long...................................................... M. guttata

4. Leaves lanceolate, linear-lanceolate to oblong, concolorous; inflorescence rachis 10–33 cm long..................................................5

5. Perigone tube 0.3–1.1 cm long; leaves lanceolate to oblong.............................................................................................................6

5. Perigone tube 1.3–1.8 cm long; leaves linear-lanceolate...................................................................................................................7

6. Leaves papillate on both surfaces; perigone 1.8–2.5 cm long, funnel-shaped, yellowish and light purple striped; perigone tube 0.3–0.7 × 0.2–0.4 cm; filaments inserted 0.3–0.7 cm above the ovary tip; style 2.1–3.5 cm long, exceeding 1.8–3 cm the perigone tube at anthesis ............................................................................................................................................................ M. occidentalis

6. Leaves smooth on both surfaces; perigone 2.8–3.5 cm long, salverform, yellowish; perigone tube 0.9–1.1 × 0.1–0.3 cm; filaments inserted 0.9–1 cm above the ovary tip; style 4.5–5 cm long, exceeding 3.5–4.2 cm the perigone tube at anthesis ....... M. planifolia

7. Leaves 24–45(–60) × 0.8–2.8 cm, flat; inflorescence rachis 10–25(–33) cm long............................................................ M. pringlei

7. Leaves (40–)50–95 × 2.5–5 cm, channeled; inflorescence rachis 20–40(–70) cm long .................................................. M. elongata

8. Perigone tube 15–25 mm long, about as long as or longer than the lobes; flowering from July to September, during the rainy season.......................................................................................................................................................................................................9

8. Perigone tube 4–13 mm long, about as long as the lobes; flowering from January to May, during the dry season........................10

9. Floral bracts (1.7–) 4.5–6.5 cm long; perigone (3–) 4–7 cm long; perigone tube 2.7–3.3 cm long.......................... M. longibracteata

9. Floral bracts 1–3.2(–4) cm long; perigone 3–3.5 cm long; perigone tube 1.5–2 cm long .................................................. M. scabra

10. Leaves reclined on the floor; flowers yellow-green; filaments exceeding the perigone tube by 4–8 cm ........................................11

10. Leaves erect; flowers reddish-green; filaments exceeding the perigone tube by 1–4 cm ................................................................12

11. Perigone tube 0.4–0.6(–1) cm long, shorter than the lobes; style 6–9 cm long ............................................................... M. jaliscana

11. Perigone tube 0.6–1.3 cm long, as long as the lobes; style 4.2–6 cm long ................................................................. M. chamelensis

12. Leaves 30–50 × 0.2–0.5 cm, involute and often appearing tubular, then 2–3 mm in diameter, wanting during the flowering time... ........................................................................................................................................................................................... M. involuta

12. Leaves 17–30(–38) × 0.6–1.4 cm, flat to channeled, present during the flowering time............................................... M. rubescens