Prockia

Ramírez, Jaime Jiménez & Durán, Ramiro Cruz, 2018, Prockia jaliscana (Salicaceae), a new species from Jalisco, Mexico, Phytotaxa 371 (1), pp. 62-66 : 65

Key to the species of Prockia with accrescent red calyx in the fruit

1. Plants with hermaphroditic flowers only; ovary 3–6 locular, with pseudoaxillary placentation; calyx never red in fruit, never covering the berry during its development.................................................... Prockia crucis , P. costaricensis , P. pentamera and P. flava .

- Plants with at least some unisexual flowers (polygamodioecious, androdioecious or dioecious); ovary unilocular, with placentation basal and / or parietal; calyx covering the fruit during its development, red, accrescent, finally opening in a kind of “second anthesis” to reveal the mature berry...................................................................................................................................................2

2. Plants with both staminate and bisexual flowers or staminate flowers only (androdioecious); stipules without several lateral glands (occasionally with a single lateral gland); all flowers apetalous, (rarely with a single petal)................................................ P. krusei

- Plants with unisexual flowers only (dioecious) or plants with both staminate and pistilate flowers (polygamodioecious); stipules with several marginal glands; pistillate flower with 3 laminate petals; staminate flowers with 3 laminate or filamentous petals or apetalous.............................................................................................................................................................................................3

3. Plants dioecious; stem bark slightly exfoliating; stipules 5–8 (–23) cm long, linear or lanceolate to foliaceous; staminate flowers: apetalous, rarely with 3 filamentous petals, stamens (75–) 92–110; pistillate flowers: staminodes 66–80, placentation both basal and parietal ........................................................................................................................................................................ P. jaliscana

- Plants polygamodioecious (some individuals have many pistillate and some staminate flowers, while others have many staminate flowers and a few pistillate ones); stem bark conspicuously exfoliating; stipules 2–4 mm long subulate; staminate flowers: with 3 laminate petals, stamens 75–80; pistillate flowers: staminodes (75–) 80–125; placentation parietal only...................... P. oaxacana